diff --git a/shadowsocks-csharp/Controller/FileManager.cs b/shadowsocks-csharp/Controller/FileManager.cs
index d7db51c1..ef30470d 100755
--- a/shadowsocks-csharp/Controller/FileManager.cs
+++ b/shadowsocks-csharp/Controller/FileManager.cs
@@ -1,4 +1,5 @@
-using System;
+using NLog;
+using System;
 using System.IO;
 using System.IO.Compression;
 using System.Text;
@@ -7,6 +8,8 @@ namespace Shadowsocks.Controller
 {
     public static class FileManager
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public static bool ByteArrayToFile(string fileName, byte[] content)
         {
             try
@@ -17,7 +20,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception ex)
             {
-                Logging.Error(ex);
+                logger.Error(ex);
             }
             return false;
         }
@@ -57,7 +60,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception ex)
             {
-                Logging.Error(ex);
+                logger.Error(ex);
                 throw ex;
             }
         }
diff --git a/shadowsocks-csharp/Controller/HotkeyReg.cs b/shadowsocks-csharp/Controller/HotkeyReg.cs
index 5482ec6d..90a3dee9 100644
--- a/shadowsocks-csharp/Controller/HotkeyReg.cs
+++ b/shadowsocks-csharp/Controller/HotkeyReg.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Windows.Forms;
-
+using NLog;
 using Shadowsocks.Controller.Hotkeys;
 using Shadowsocks.Model;
 
@@ -9,6 +9,7 @@ namespace Shadowsocks.Controller
 {
     static class HotkeyReg
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
         public static void RegAllHotkeys()
         {
             var hotkeyConfig = Configuration.Load().hotkey;
@@ -60,7 +61,7 @@ namespace Shadowsocks.Controller
                 var hotkey = HotKeys.Str2HotKey(hotkeyStr);
                 if (hotkey == null)
                 {
-                    Logging.Error($"Cannot parse hotkey: {hotkeyStr}");
+                    logger.Error($"Cannot parse hotkey: {hotkeyStr}");
                     onComplete?.Invoke(RegResult.ParseError);
                     return false;
                 }
diff --git a/shadowsocks-csharp/Controller/I18N.cs b/shadowsocks-csharp/Controller/I18N.cs
index 7102b79a..eb948c39 100755
--- a/shadowsocks-csharp/Controller/I18N.cs
+++ b/shadowsocks-csharp/Controller/I18N.cs
@@ -1,4 +1,5 @@
 using Microsoft.VisualBasic.FileIO;
+using NLog;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
 using System.Collections.Generic;
@@ -9,9 +10,10 @@ using System.Windows.Forms;
 
 namespace Shadowsocks.Controller
 {
-
     public static class I18N
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public const string I18N_FILE = "i18n.csv";
 
         private static Dictionary<string, string> _strings = new Dictionary<string, string>();
@@ -47,12 +49,12 @@ namespace Shadowsocks.Controller
                     }
                     if (targetIndex != -1 && enIndex != targetIndex)
                     {
-                        Logging.Info($"Using {localeNames[targetIndex]} translation for {locale}");
+                        logger.Info($"Using {localeNames[targetIndex]} translation for {locale}");
                     }
                     else
                     {
                         // Still not found, exit
-                        Logging.Info($"Translation for {locale} not found");
+                        logger.Info($"Translation for {locale} not found");
                         return;
                     }
                 }
@@ -85,10 +87,10 @@ namespace Shadowsocks.Controller
             }
             else
             {
-                Logging.Info("Using external translation");
+                logger.Info("Using external translation");
                 i18n = File.ReadAllText(I18N_FILE, Encoding.UTF8);
             }
-            Logging.Info("Current language is: " + locale);
+            logger.Info("Current language is: " + locale);
             Init(i18n, locale);
         }
 
diff --git a/shadowsocks-csharp/Controller/LoggerExtension.cs b/shadowsocks-csharp/Controller/LoggerExtension.cs
new file mode 100644
index 00000000..bd9b5925
--- /dev/null
+++ b/shadowsocks-csharp/Controller/LoggerExtension.cs
@@ -0,0 +1,119 @@
+using System;
+using System.ComponentModel;
+using System.IO;
+using System.Net.Sockets;
+using System.Net;
+using System.Diagnostics;
+using System.Text;
+using Shadowsocks.Util.SystemProxy;
+
+namespace NLog
+{
+    public static class LoggerExtension
+    {
+        public static void Dump(this Logger logger, string tag, byte[] arr, int length)
+        {
+            if (logger.IsTraceEnabled)
+            {
+                var sb = new StringBuilder($"{Environment.NewLine}{tag}: ");
+                for (int i = 0; i < length - 1; i++)
+                {
+                    sb.Append($"0x{arr[i]:X2}, ");
+                }
+                sb.Append($"0x{arr[length - 1]:X2}");
+                sb.Append(Environment.NewLine);
+                logger.Trace(sb.ToString());
+            }
+        }
+
+        public static void Debug(this Logger logger, EndPoint local, EndPoint remote, int len, string header = null, string tailer = null)
+        {
+            if (logger.IsDebugEnabled)
+            {
+                if (header == null && tailer == null)
+                    logger.Debug($"{local} => {remote} (size={len})");
+                else if (header == null && tailer != null)
+                    logger.Debug($"{local} => {remote} (size={len}), {tailer}");
+                else if (header != null && tailer == null)
+                    logger.Debug($"{header}: {local} => {remote} (size={len})");
+                else
+                    logger.Debug($"{header}: {local} => {remote} (size={len}), {tailer}");
+            }
+        }
+
+        public static void Debug(this Logger logger, Socket sock, int len, string header = null, string tailer = null)
+        {
+            if (logger.IsDebugEnabled)
+            {
+                logger.Debug(sock.LocalEndPoint, sock.RemoteEndPoint, len, header, tailer);
+            }
+        }
+
+        public static void LogUsefulException(this Logger logger, Exception e)
+        {
+            // just log useful exceptions, not all of them
+            if (e is SocketException)
+            {
+                SocketException se = (SocketException)e;
+                if (se.SocketErrorCode == SocketError.ConnectionAborted)
+                {
+                    // closed by browser when sending
+                    // normally happens when download is canceled or a tab is closed before page is loaded
+                }
+                else if (se.SocketErrorCode == SocketError.ConnectionReset)
+                {
+                    // received rst
+                }
+                else if (se.SocketErrorCode == SocketError.NotConnected)
+                {
+                    // The application tried to send or receive data, and the System.Net.Sockets.Socket is not connected.
+                }
+                else if (se.SocketErrorCode == SocketError.HostUnreachable)
+                {
+                    // There is no network route to the specified host.
+                }
+                else if (se.SocketErrorCode == SocketError.TimedOut)
+                {
+                    // The connection attempt timed out, or the connected host has failed to respond.
+                }
+                else
+                {
+                    logger.Warn(e);
+                }
+            }
+            else if (e is ObjectDisposedException)
+            {
+            }
+            else if (e is Win32Exception)
+            {
+                var ex = (Win32Exception)e;
+
+                // Win32Exception (0x80004005): A 32 bit processes cannot access modules of a 64 bit process.
+                if ((uint)ex.ErrorCode != 0x80004005)
+                {
+                    logger.Warn(e);
+                }
+            }
+            else if (e is ProxyException)
+            {
+                var ex = (ProxyException)e;
+                switch (ex.Type)
+                {
+                    case ProxyExceptionType.FailToRun:
+                    case ProxyExceptionType.QueryReturnMalformed:
+                    case ProxyExceptionType.SysproxyExitError:
+                        logger.Error($"sysproxy - {ex.Type.ToString()}:{ex.Message}");
+                        break;
+                    case ProxyExceptionType.QueryReturnEmpty:
+                    case ProxyExceptionType.Unspecific:
+                        logger.Error($"sysproxy - {ex.Type.ToString()}");
+                        break;
+                }
+            }
+            else
+            {
+                logger.Warn(e);
+            }
+        }
+    }
+}
diff --git a/shadowsocks-csharp/Controller/Logging.cs b/shadowsocks-csharp/Controller/Logging.cs
deleted file mode 100755
index 1ea6f276..00000000
--- a/shadowsocks-csharp/Controller/Logging.cs
+++ /dev/null
@@ -1,198 +0,0 @@
-using System;
-using System.ComponentModel;
-using System.IO;
-using System.Net.Sockets;
-using System.Net;
-using System.Diagnostics;
-using System.Text;
-using Shadowsocks.Util;
-using Shadowsocks.Util.SystemProxy;
-
-namespace Shadowsocks.Controller
-{
-    public class Logging
-    {
-        public static string LogFilePath;
-
-        private static FileStream _fs;
-        private static StreamWriterWithTimestamp _sw;
-
-        public static bool OpenLogFile()
-        {
-            try
-            {
-                LogFilePath = Utils.GetTempPath("shadowsocks.log");
-
-                _fs = new FileStream(LogFilePath, FileMode.Append);
-                _sw = new StreamWriterWithTimestamp(_fs);
-                _sw.AutoFlush = true;
-                Console.SetOut(_sw);
-                Console.SetError(_sw);
-
-                return true;
-            }
-            catch (IOException e)
-            {
-                Console.WriteLine(e.ToString());
-                return false;
-            }
-        }
-
-        private static void WriteToLogFile(object o)
-        {
-            try {
-                Console.WriteLine(o);
-            } catch(ObjectDisposedException) {
-            }
-        }
-
-        public static void Error(object o)
-        {
-            WriteToLogFile("[E] " + o);
-        }
-
-        public static void Info(object o)
-        {
-            WriteToLogFile(o);
-        }
-
-        public static void Clear() {
-            _sw.Close();
-            _sw.Dispose();
-            _fs.Close();
-            _fs.Dispose();
-            File.Delete(LogFilePath);
-            OpenLogFile();
-        }
-
-        [Conditional("DEBUG")]
-        public static void Debug(object o)
-        {
-            WriteToLogFile("[D] " + o);
-        }
-
-        [Conditional("DEBUG")]
-        public static void Dump(string tag, byte[] arr, int length)
-        {
-            var sb = new StringBuilder($"{Environment.NewLine}{tag}: ");
-            for (int i = 0; i < length - 1; i++) {
-                sb.Append($"0x{arr[i]:X2}, ");
-            }
-            sb.Append($"0x{arr[length - 1]:X2}");
-            sb.Append(Environment.NewLine);
-            Debug(sb.ToString());
-        }
-
-        [Conditional("DEBUG")]
-        public static void Debug(EndPoint local, EndPoint remote, int len, string header = null, string tailer = null)
-        {
-            if (header == null && tailer == null)
-                Debug($"{local} => {remote} (size={len})");
-            else if (header == null && tailer != null)
-                Debug($"{local} => {remote} (size={len}), {tailer}");
-            else if (header != null && tailer == null)
-                Debug($"{header}: {local} => {remote} (size={len})");
-            else
-                Debug($"{header}: {local} => {remote} (size={len}), {tailer}");
-        }
-
-        [Conditional("DEBUG")]
-        public static void Debug(Socket sock, int len, string header = null, string tailer = null)
-        {
-            Debug(sock.LocalEndPoint, sock.RemoteEndPoint, len, header, tailer);
-        }
-
-        public static void LogUsefulException(Exception e)
-        {
-            // just log useful exceptions, not all of them
-            if (e is SocketException)
-            {
-                SocketException se = (SocketException)e;
-                if (se.SocketErrorCode == SocketError.ConnectionAborted)
-                {
-                    // closed by browser when sending
-                    // normally happens when download is canceled or a tab is closed before page is loaded
-                }
-                else if (se.SocketErrorCode == SocketError.ConnectionReset)
-                {
-                    // received rst
-                }
-                else if (se.SocketErrorCode == SocketError.NotConnected)
-                {
-                    // The application tried to send or receive data, and the System.Net.Sockets.Socket is not connected.
-                }
-                else if (se.SocketErrorCode == SocketError.HostUnreachable)
-                {
-                    // There is no network route to the specified host.
-                }
-                else if (se.SocketErrorCode == SocketError.TimedOut)
-                {
-                    // The connection attempt timed out, or the connected host has failed to respond.
-                }
-                else
-                {
-                    Info(e);
-                }
-            }
-            else if (e is ObjectDisposedException)
-            {
-            }
-            else if (e is Win32Exception)
-            {
-                var ex = (Win32Exception) e;
-
-                // Win32Exception (0x80004005): A 32 bit processes cannot access modules of a 64 bit process.
-                if ((uint) ex.ErrorCode != 0x80004005)
-                {
-                    Info(e);
-                }
-            }
-            else if (e is ProxyException)
-            {
-                var ex = (ProxyException)e;
-                switch (ex.Type)
-                {
-                    case ProxyExceptionType.FailToRun:
-                    case ProxyExceptionType.QueryReturnMalformed:
-                    case ProxyExceptionType.SysproxyExitError:
-                        Error($"sysproxy - {ex.Type.ToString()}:{ex.Message}");
-                        break;
-                    case ProxyExceptionType.QueryReturnEmpty:
-                    case ProxyExceptionType.Unspecific:
-                        Error($"sysproxy - {ex.Type.ToString()}");
-                        break;
-                }
-
-
-            }
-            else
-            {
-                Info(e);
-            }
-        }
-    }
-
-    // Simply extended System.IO.StreamWriter for adding timestamp workaround
-    public class StreamWriterWithTimestamp : StreamWriter
-    {
-        public StreamWriterWithTimestamp(Stream stream) : base(stream)
-        {
-        }
-
-        private string GetTimestamp()
-        {
-            return "[" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "] ";
-        }
-
-        public override void WriteLine(string value)
-        {
-            base.WriteLine(GetTimestamp() + value);
-        }
-
-        public override void Write(string value)
-        {
-            base.Write(GetTimestamp() + value);
-        }
-    }
-
-}
diff --git a/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs b/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
index 7cbeb743..5d11e1d8 100644
--- a/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
+++ b/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
@@ -9,6 +9,7 @@ using System.Net.Sockets;
 using System.Threading;
 using System.Threading.Tasks;
 using Newtonsoft.Json;
+using NLog;
 using Shadowsocks.Model;
 using Shadowsocks.Util;
 
@@ -18,6 +19,8 @@ namespace Shadowsocks.Controller
 
     public sealed class AvailabilityStatistics : IDisposable
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public const string DateTimePattern = "yyyy-MM-dd HH:mm:ss";
         private const string StatisticsFilesName = "shadowsocks.availability.json";
         public static string AvailabilityStatisticsFile;
@@ -111,7 +114,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -155,7 +158,7 @@ namespace Shadowsocks.Controller
                 inR.Add(inboundSpeed);
                 outR.Add(outboundSpeed);
 
-                Logging.Debug(
+                logger.Debug(
                     $"{id}: current/max inbound {inboundSpeed}/{inR.Max()} KiB/s, current/max outbound {outboundSpeed}/{outR.Max()} KiB/s");
             }
         }
@@ -213,7 +216,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.Debug("config changed asynchrously, just ignore this server");
+                    logger.Debug("config changed asynchrously, just ignore this server");
                 }
             }
 
@@ -235,7 +238,7 @@ namespace Shadowsocks.Controller
             {
                 AppendRecord(server.Identifier(), record);
             }
-            Logging.Debug($"Ping {server.FriendlyName()} {e.RoundtripTime.Count} times, {(100 - record.PackageLoss * 100)}% packages loss, min {record.MinResponse} ms, max {record.MaxResponse} ms, avg {record.AverageResponse} ms");
+            logger.Debug($"Ping {server.FriendlyName()} {e.RoundtripTime.Count} times, {(100 - record.PackageLoss * 100)}% packages loss, min {record.MinResponse} ms, max {record.MaxResponse} ms, avg {record.AverageResponse} ms");
             if (Interlocked.Decrement(ref state.counter) == 0)
             {
                 Save();
@@ -260,13 +263,13 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
         private void Save()
         {
-            Logging.Debug($"save statistics to {AvailabilityStatisticsFile}");
+            logger.Debug($"save statistics to {AvailabilityStatisticsFile}");
             if (RawStatistics.Count == 0)
             {
                 return;
@@ -283,7 +286,7 @@ namespace Shadowsocks.Controller
             }
             catch (IOException e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -300,7 +303,7 @@ namespace Shadowsocks.Controller
         {
             try
             {
-                Logging.Debug("filter raw statistics");
+                logger.Debug("filter raw statistics");
                 if (RawStatistics == null) return;
                 var filteredStatistics = new Statistics();
 
@@ -315,7 +318,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -324,7 +327,7 @@ namespace Shadowsocks.Controller
             try
             {
                 var path = AvailabilityStatisticsFile;
-                Logging.Debug($"loading statistics from {path}");
+                logger.Debug($"loading statistics from {path}");
                 if (!File.Exists(path))
                 {
                     using (File.Create(path))
@@ -337,7 +340,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 Console.WriteLine($"failed to load statistics; use runtime statistics, some data may be lost");
             }
         }
@@ -411,6 +414,8 @@ namespace Shadowsocks.Controller
 
         class MyPing
         {
+            private static Logger logger = LogManager.GetCurrentClassLogger();
+
             //arguments for ICMP tests
             public const int TimeoutMilliseconds = 500;
 
@@ -445,7 +450,7 @@ namespace Shadowsocks.Controller
             {
                 try
                 {
-                    Logging.Debug($"Ping {server.FriendlyName()}");
+                    logger.Debug($"Ping {server.FriendlyName()}");
                     if (ip == null)
                     {
                         ip = Dns.GetHostAddresses(server.server)
@@ -461,8 +466,8 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.Error($"An exception occured while eveluating {server.FriendlyName()}");
-                    Logging.LogUsefulException(e);
+                    logger.Error($"An exception occured while eveluating {server.FriendlyName()}");
+                    logger.LogUsefulException(e);
                     FireCompleted(e, userstate);
                 }
             }
@@ -473,20 +478,20 @@ namespace Shadowsocks.Controller
                 {
                     if (e.Reply.Status == IPStatus.Success)
                     {
-                        Logging.Debug($"Ping {server.FriendlyName()} {e.Reply.RoundtripTime} ms");
+                        logger.Debug($"Ping {server.FriendlyName()} {e.Reply.RoundtripTime} ms");
                         RoundtripTime.Add((int?)e.Reply.RoundtripTime);
                     }
                     else
                     {
-                        Logging.Debug($"Ping {server.FriendlyName()} timeout");
+                        logger.Debug($"Ping {server.FriendlyName()} timeout");
                         RoundtripTime.Add(null);
                     }
                     TestNext(e.UserState);
                 }
                 catch (Exception ex)
                 {
-                    Logging.Error($"An exception occured while eveluating {server.FriendlyName()}");
-                    Logging.LogUsefulException(ex);
+                    logger.Error($"An exception occured while eveluating {server.FriendlyName()}");
+                    logger.LogUsefulException(ex);
                     FireCompleted(ex, e.UserState);
                 }
             }
diff --git a/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs b/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs
index 38044315..7f380cb4 100644
--- a/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs
+++ b/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs
@@ -5,7 +5,7 @@ using System.Net;
 using System.Text;
 
 using Newtonsoft.Json;
-
+using NLog;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
@@ -14,6 +14,8 @@ namespace Shadowsocks.Controller
 {
     public class GFWListUpdater
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const string GFWLIST_URL = "https://raw.githubusercontent.com/gfwlist/gfwlist/master/gfwlist.txt";
 
         public event EventHandler<ResultEventArgs> UpdateCompleted;
@@ -93,10 +95,10 @@ var __RULES__ = {JsonConvert.SerializeObject(gfwLines, Formatting.Indented)};
             string gfwListUrl = GFWLIST_URL;
             if (!string.IsNullOrWhiteSpace(config.gfwListUrl))
             {
-                Logging.Info("Found custom GFWListURL in config file");
+                logger.Info("Found custom GFWListURL in config file");
                 gfwListUrl = config.gfwListUrl;
             }
-            Logging.Info($"Checking GFWList from {gfwListUrl}");
+            logger.Info($"Checking GFWList from {gfwListUrl}");
             WebClient http = new WebClient();
             if (config.enabled)
             {
diff --git a/shadowsocks-csharp/Controller/Service/Listener.cs b/shadowsocks-csharp/Controller/Service/Listener.cs
index 70819163..2627587c 100644
--- a/shadowsocks-csharp/Controller/Service/Listener.cs
+++ b/shadowsocks-csharp/Controller/Service/Listener.cs
@@ -4,13 +4,15 @@ using System.Linq;
 using System.Net;
 using System.Net.NetworkInformation;
 using System.Net.Sockets;
-
+using NLog;
 using Shadowsocks.Model;
 
 namespace Shadowsocks.Controller
 {
     public class Listener
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public interface IService
         {
             bool Handle(byte[] firstPacket, int length, Socket socket, object state);
@@ -80,11 +82,8 @@ namespace Shadowsocks.Controller
                 _tcpSocket.Listen(1024);
 
                 // Start an asynchronous socket to listen for connections.
-                Logging.Info($"Shadowsocks started ({UpdateChecker.Version})");
-                if (_config.isVerboseLogging)
-                {
-                    Logging.Info(Encryption.EncryptorFactory.DumpRegisteredEncryptor());
-                }
+                logger.Info($"Shadowsocks started ({UpdateChecker.Version})");
+                logger.Debug(Encryption.EncryptorFactory.DumpRegisteredEncryptor());
                 _tcpSocket.BeginAccept(new AsyncCallback(AcceptCallback), _tcpSocket);
                 UDPState udpState = new UDPState(_udpSocket);
                 _udpSocket.BeginReceiveFrom(udpState.buffer, 0, udpState.buffer.Length, 0, ref udpState.remoteEndPoint, new AsyncCallback(RecvFromCallback), udpState);
@@ -132,7 +131,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception ex)
             {
-                Logging.Debug(ex);
+                logger.Debug(ex);
             }
             finally
             {
@@ -171,7 +170,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
             finally
             {
@@ -187,7 +186,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                 }
             }
         }
@@ -218,7 +217,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 conn.Close();
             }
         }
diff --git a/shadowsocks-csharp/Controller/Service/PACDaemon.cs b/shadowsocks-csharp/Controller/Service/PACDaemon.cs
index 11dc18b4..3aee925a 100644
--- a/shadowsocks-csharp/Controller/Service/PACDaemon.cs
+++ b/shadowsocks-csharp/Controller/Service/PACDaemon.cs
@@ -1,4 +1,5 @@
-using Shadowsocks.Properties;
+using NLog;
+using Shadowsocks.Properties;
 using Shadowsocks.Util;
 using System;
 using System.Collections.Generic;
@@ -15,6 +16,8 @@ namespace Shadowsocks.Controller
     /// </summary>
     public class PACDaemon
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public const string PAC_FILE = "pac.txt";
         public const string USER_RULE_FILE = "user-rule.txt";
         public const string USER_ABP_FILE = "abp.txt";
@@ -100,7 +103,7 @@ namespace Shadowsocks.Controller
         {
             if (PACFileChanged != null)
             {
-                Logging.Info($"Detected: PAC file '{e.Name}' was {e.ChangeType.ToString().ToLower()}.");
+                logger.Info($"Detected: PAC file '{e.Name}' was {e.ChangeType.ToString().ToLower()}.");
                 Task.Factory.StartNew(() =>
                 {
                     ((FileSystemWatcher)sender).EnableRaisingEvents = false;
@@ -115,7 +118,7 @@ namespace Shadowsocks.Controller
         {
             if (UserRuleFileChanged != null)
             {
-                Logging.Info($"Detected: User Rule file '{e.Name}' was {e.ChangeType.ToString().ToLower()}.");
+                logger.Info($"Detected: User Rule file '{e.Name}' was {e.ChangeType.ToString().ToLower()}.");
                 Task.Factory.StartNew(() =>
                 {
                     ((FileSystemWatcher)sender).EnableRaisingEvents = false;
diff --git a/shadowsocks-csharp/Controller/Service/PACServer.cs b/shadowsocks-csharp/Controller/Service/PACServer.cs
index 57e64ca2..7fd9250e 100644
--- a/shadowsocks-csharp/Controller/Service/PACServer.cs
+++ b/shadowsocks-csharp/Controller/Service/PACServer.cs
@@ -6,11 +6,14 @@ using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Web;
+using NLog;
 
 namespace Shadowsocks.Controller
 {
     public class PACServer : Listener.Service
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public const string RESOURCE_NAME = "pac";
 
         private string PacSecret
@@ -43,7 +46,7 @@ namespace Shadowsocks.Controller
             string usedSecret = _config.secureLocalPac ? $"&secret={PacSecret}" : "";
             string contentHash = GetHash(_pacDaemon.GetPACContent());
             PacUrl = $"http://{config.localHost}:{config.localPort}/{RESOURCE_NAME}?hash={contentHash}{usedSecret}";
-            Logging.Debug("Set PAC URL:" + PacUrl);
+            logger.Debug("Set PAC URL:" + PacUrl);
         }
 
         private static string GetHash(string content)
@@ -177,7 +180,7 @@ Connection: Close
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 socket.Close();
             }
         }
diff --git a/shadowsocks-csharp/Controller/Service/PortForwarder.cs b/shadowsocks-csharp/Controller/Service/PortForwarder.cs
index 1acfa5bd..8284fd11 100644
--- a/shadowsocks-csharp/Controller/Service/PortForwarder.cs
+++ b/shadowsocks-csharp/Controller/Service/PortForwarder.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Net;
 using System.Net.Sockets;
+using NLog;
 using Shadowsocks.Util.Sockets;
 
 namespace Shadowsocks.Controller
@@ -26,6 +27,8 @@ namespace Shadowsocks.Controller
 
         private class Handler
         {
+            private static Logger logger = LogManager.GetCurrentClassLogger();
+
             private byte[] _firstPacket;
             private int _firstPacketLength;
             private Socket _local;
@@ -58,7 +61,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -77,7 +80,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -94,7 +97,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -115,7 +118,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -142,7 +145,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -169,7 +172,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -188,7 +191,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -207,7 +210,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                     Close();
                 }
             }
@@ -239,7 +242,7 @@ namespace Shadowsocks.Controller
                     }
                     catch (Exception e)
                     {
-                        Logging.LogUsefulException(e);
+                        logger.LogUsefulException(e);
                     }
                 }
                 if (_remote != null)
@@ -251,7 +254,7 @@ namespace Shadowsocks.Controller
                     }
                     catch (SocketException e)
                     {
-                        Logging.LogUsefulException(e);
+                        logger.LogUsefulException(e);
                     }
                 }
             }
diff --git a/shadowsocks-csharp/Controller/Service/PrivoxyRunner.cs b/shadowsocks-csharp/Controller/Service/PrivoxyRunner.cs
index 187e7a09..0a6135d1 100644
--- a/shadowsocks-csharp/Controller/Service/PrivoxyRunner.cs
+++ b/shadowsocks-csharp/Controller/Service/PrivoxyRunner.cs
@@ -6,6 +6,7 @@ using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Windows.Forms;
+using NLog;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
@@ -15,6 +16,8 @@ namespace Shadowsocks.Controller
 {
     class PrivoxyRunner
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private static int _uid;
         private static string _uniqueConfigFile;
         private static Job _privoxyJob;
@@ -33,7 +36,7 @@ namespace Shadowsocks.Controller
             }
             catch (IOException e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -106,7 +109,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -139,7 +142,7 @@ namespace Shadowsocks.Controller
                  * are already dead, and that will cause exceptions here.
                  * We could simply ignore those exceptions.
                  */
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
                 return false;
             }
         }
@@ -159,7 +162,7 @@ namespace Shadowsocks.Controller
             catch (Exception e)
             {
                 // in case access denied
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 return defaultPort;
             }
         }
diff --git a/shadowsocks-csharp/Controller/Service/TCPRelay.cs b/shadowsocks-csharp/Controller/Service/TCPRelay.cs
index 7c89cac3..8327bda9 100644
--- a/shadowsocks-csharp/Controller/Service/TCPRelay.cs
+++ b/shadowsocks-csharp/Controller/Service/TCPRelay.cs
@@ -1,4 +1,5 @@
-using System;
+using NLog;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
@@ -17,6 +18,7 @@ namespace Shadowsocks.Controller
 {
     class TCPRelay : Listener.Service
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
         private ShadowsocksController _controller;
         private DateTime _lastSweepTime;
         private Configuration _config;
@@ -54,7 +56,7 @@ namespace Shadowsocks.Controller
             }
             foreach (TCPHandler handler1 in handlersToClose)
             {
-                Logging.Debug("Closing timed out TCP connection.");
+                logger.Debug("Closing timed out TCP connection.");
                 handler1.Close();
             }
 
@@ -122,6 +124,8 @@ namespace Shadowsocks.Controller
             }
         }
 
+        private static Logger Logger = LogManager.GetCurrentClassLogger();
+
         private readonly int _serverTimeout;
         private readonly int _proxyTimeout;
 
@@ -217,7 +221,7 @@ namespace Shadowsocks.Controller
             this._server = server;
 
             /* prepare address buffer length for AEAD */
-            Logging.Debug($"_addrBufLength={_addrBufLength}");
+            Logger.Debug($"_addrBufLength={_addrBufLength}");
             _encryptor.AddrBufLength = _addrBufLength;
         }
 
@@ -252,7 +256,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
             }
 
             if (_currentRemoteSession != null)
@@ -265,7 +269,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (Exception e)
                 {
-                    Logging.LogUsefulException(e);
+                    Logger.LogUsefulException(e);
                 }
             }
 
@@ -291,7 +295,7 @@ namespace Shadowsocks.Controller
                     {
                         // reject socks 4
                         response = new byte[] { 0, 91 };
-                        Logging.Error("socks 5 protocol error");
+                        Logger.Error("socks 5 protocol error");
                     }
                     _connection.BeginSend(response, 0, response.Length, SocketFlags.None,
                         HandshakeSendCallback, null);
@@ -301,7 +305,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -326,7 +330,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -358,21 +362,21 @@ namespace Shadowsocks.Controller
                             break;
                         case CMD_BIND:  // not implemented
                         default:
-                            Logging.Debug("Unsupported CMD=" + _command);
+                            Logger.Debug("Unsupported CMD=" + _command);
                             Close();
                             break;
                     }
                 }
                 else
                 {
-                    Logging.Debug(
+                    Logger.Debug(
                         "failed to recv data in Shadowsocks.Controller.TCPHandler.handshakeReceive2Callback()");
                     Close();
                 }
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -387,7 +391,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -409,7 +413,7 @@ namespace Shadowsocks.Controller
                     ReadAddress(16 + ADDR_PORT_LEN - 1, onSuccess);
                     break;
                 default:
-                    Logging.Debug("Unsupported ATYP=" + atyp);
+                    Logger.Debug("Unsupported ATYP=" + atyp);
                     Close();
                     break;
             }
@@ -468,10 +472,7 @@ namespace Shadowsocks.Controller
                             break;
                     }
 
-                    if (_config.isVerboseLogging)
-                    {
-                        Logging.Info($"connect to {dstAddr}:{dstPort}");
-                    }
+                     Logger.Debug($"connect to {dstAddr}:{dstPort}");
 
                     _destEndPoint = SocketUtil.GetEndPoint(dstAddr, dstPort);
 
@@ -479,13 +480,13 @@ namespace Shadowsocks.Controller
                 }
                 else
                 {
-                    Logging.Debug("failed to recv data in Shadowsocks.Controller.TCPHandler.OnAddressFullyRead()");
+                    Logger.Debug("failed to recv data in Shadowsocks.Controller.TCPHandler.OnAddressFullyRead()");
                     Close();
                 }
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -537,7 +538,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -631,7 +632,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -650,7 +651,7 @@ namespace Shadowsocks.Controller
             }
             var proxy = timer.Session.Remote;
 
-            Logging.Info($"Proxy {proxy.ProxyEndPoint} timed out");
+            Logger.Info($"Proxy {proxy.ProxyEndPoint} timed out");
             proxy.Close();
             Close();
         }
@@ -678,12 +679,9 @@ namespace Shadowsocks.Controller
 
                 _proxyConnected = true;
 
-                if (_config.isVerboseLogging)
+                if (!(remote is DirectConnect))
                 {
-                    if (!(remote is DirectConnect))
-                    {
-                        Logging.Info($"Socket connected to proxy {remote.ProxyEndPoint}");
-                    }
+                    Logger.Debug($"Socket connected to proxy {remote.ProxyEndPoint}");
                 }
 
                 _startConnectTime = DateTime.Now;
@@ -710,7 +708,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -731,7 +729,7 @@ namespace Shadowsocks.Controller
             Server server = timer.Server;
             IStrategy strategy = _controller.GetCurrentStrategy();
             strategy?.SetFailure(server);
-            Logging.Info($"{server.FriendlyName()} timed out");
+            Logger.Info($"{server.FriendlyName()} timed out");
             session.Remote.Close();
             Close();
         }
@@ -754,10 +752,7 @@ namespace Shadowsocks.Controller
 
                 _destConnected = true;
 
-                if (_config.isVerboseLogging)
-                {
-                    Logging.Info($"Socket connected to ss server: {_server.FriendlyName()}");
-                }
+                Logger.Debug($"Socket connected to ss server: {_server.FriendlyName()}");
 
                 var latency = DateTime.Now - _startConnectTime;
                 IStrategy strategy = _controller.GetCurrentStrategy();
@@ -776,7 +771,7 @@ namespace Shadowsocks.Controller
                     IStrategy strategy = _controller.GetCurrentStrategy();
                     strategy?.SetFailure(_server);
                 }
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -803,12 +798,12 @@ namespace Shadowsocks.Controller
                     PipeRemoteReceiveCallback, session);
 
                 TryReadAvailableData();
-                Logging.Debug($"_firstPacketLength = {_firstPacketLength}");
+                Logger.Debug($"_firstPacketLength = {_firstPacketLength}");
                 SendToServer(_firstPacketLength, session);
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -834,7 +829,7 @@ namespace Shadowsocks.Controller
                         }
                         catch (CryptoErrorException)
                         {
-                            Logging.Error("decryption error");
+                            Logger.Error("decryption error");
                             Close();
                             return;
                         }
@@ -842,12 +837,12 @@ namespace Shadowsocks.Controller
                     if (bytesToSend == 0)
                     {
                         // need more to decrypt
-                        Logging.Debug("Need more to decrypt");
+                        Logger.Debug("Need more to decrypt");
                         session.Remote.BeginReceive(_remoteRecvBuffer, 0, RecvSize, SocketFlags.None,
                             PipeRemoteReceiveCallback, session);
                         return;
                     }
-                    Logging.Debug($"start sending {bytesToSend}");
+                    Logger.Debug($"start sending {bytesToSend}");
                     _connection.BeginSend(_remoteSendBuffer, 0, bytesToSend, SocketFlags.None,
                         PipeConnectionSendCallback, new object[] { session, bytesToSend });
                     IStrategy strategy = _controller.GetCurrentStrategy();
@@ -862,7 +857,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -890,7 +885,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -907,7 +902,7 @@ namespace Shadowsocks.Controller
                 }
                 catch (CryptoErrorException)
                 {
-                    Logging.Debug("encryption error");
+                    Logger.Debug("encryption error");
                     Close();
                     return;
                 }
@@ -932,7 +927,7 @@ namespace Shadowsocks.Controller
                 int bytesRemaining = bytesShouldSend - bytesSent;
                 if (bytesRemaining > 0)
                 {
-                    Logging.Info("reconstruct _connetionSendBuffer to re-send");
+                    Logger.Info("reconstruct _connetionSendBuffer to re-send");
                     Buffer.BlockCopy(_connetionSendBuffer, bytesSent, _connetionSendBuffer, 0, bytesRemaining);
                     session.Remote.BeginSend(_connetionSendBuffer, 0, bytesRemaining, SocketFlags.None,
                         PipeRemoteSendCallback, new object[] { session, bytesRemaining });
@@ -943,7 +938,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
@@ -960,7 +955,7 @@ namespace Shadowsocks.Controller
                 var bytesRemaining = bytesShouldSend - bytesSent;
                 if (bytesRemaining > 0)
                 {
-                    Logging.Info("reconstruct _remoteSendBuffer to re-send");
+                    Logger.Info("reconstruct _remoteSendBuffer to re-send");
                     Buffer.BlockCopy(_remoteSendBuffer, bytesSent, _remoteSendBuffer, 0, bytesRemaining);
                     _connection.BeginSend(_remoteSendBuffer, 0, bytesRemaining, SocketFlags.None,
                         PipeConnectionSendCallback, new object[] { session, bytesRemaining });
@@ -971,7 +966,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                Logger.LogUsefulException(e);
                 Close();
             }
         }
diff --git a/shadowsocks-csharp/Controller/Service/UDPRelay.cs b/shadowsocks-csharp/Controller/Service/UDPRelay.cs
index 5ac03839..568e1f75 100644
--- a/shadowsocks-csharp/Controller/Service/UDPRelay.cs
+++ b/shadowsocks-csharp/Controller/Service/UDPRelay.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Net;
 using System.Net.Sockets;
 using System.Runtime.CompilerServices;
+using NLog;
 using Shadowsocks.Controller.Strategy;
 using Shadowsocks.Encryption;
 using Shadowsocks.Model;
@@ -49,6 +50,8 @@ namespace Shadowsocks.Controller
 
         public class UDPHandler
         {
+            private static Logger logger = LogManager.GetCurrentClassLogger();
+
             private Socket _local;
             private Socket _remote;
 
@@ -98,14 +101,14 @@ namespace Shadowsocks.Controller
                 byte[] dataOut = new byte[65536];  // enough space for AEAD ciphers
                 int outlen;
                 encryptor.EncryptUDP(dataIn, length - 3, dataOut, out outlen);
-                Logging.Debug(_localEndPoint, _remoteEndPoint, outlen, "UDP Relay");
+                logger.Debug(_localEndPoint, _remoteEndPoint, outlen, "UDP Relay");
                 _remote?.SendTo(dataOut, outlen, SocketFlags.None, _remoteEndPoint);
             }
 
             public void Receive()
             {
                 EndPoint remoteEndPoint = new IPEndPoint(GetIPAddress(), 0);
-                Logging.Debug($"++++++Receive Server Port, size:" + _buffer.Length);
+                logger.Debug($"++++++Receive Server Port, size:" + _buffer.Length);
                 _remote?.BeginReceiveFrom(_buffer, 0, _buffer.Length, 0, ref remoteEndPoint, new AsyncCallback(RecvFromCallback), null);
             }
 
@@ -126,7 +129,7 @@ namespace Shadowsocks.Controller
                     byte[] sendBuf = new byte[outlen + 3];
                     Array.Copy(dataOut, 0, sendBuf, 3, outlen);
 
-                    Logging.Debug(_localEndPoint, _remoteEndPoint, outlen, "UDP Relay");
+                    logger.Debug(_localEndPoint, _remoteEndPoint, outlen, "UDP Relay");
                     _local?.SendTo(sendBuf, outlen + 3, 0, _localEndPoint);
 
                     Receive();
diff --git a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
index cce193f1..fb1aa331 100644
--- a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
+++ b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
@@ -4,7 +4,7 @@ using System.Net;
 using System.Text.RegularExpressions;
 
 using Newtonsoft.Json.Linq;
-
+using NLog;
 using Shadowsocks.Model;
 using Shadowsocks.Util;
 
@@ -12,6 +12,8 @@ namespace Shadowsocks.Controller
 {
     public class UpdateChecker
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const string UpdateURL = "https://api.github.com/repos/shadowsocks/shadowsocks-windows/releases";
         private const string UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36";
 
@@ -60,14 +62,14 @@ namespace Shadowsocks.Controller
 
             try
             {
-                Logging.Debug("Checking updates...");
+                logger.Debug("Checking updates...");
                 WebClient http = CreateWebClient();
                 http.DownloadStringCompleted += http_DownloadStringCompleted;
                 http.DownloadStringAsync(new Uri(UpdateURL));
             }
             catch (Exception ex)
             {
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
             }
         }
 
@@ -117,7 +119,7 @@ namespace Shadowsocks.Controller
                 }
                 else
                 {
-                    Logging.Debug("No update is available");
+                    logger.Debug("No update is available");
                     if (CheckUpdateCompleted != null)
                     {
                         CheckUpdateCompleted(this, new EventArgs());
@@ -126,7 +128,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception ex)
             {
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
             }
         }
 
@@ -141,7 +143,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception ex)
             {
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
             }
         }
 
@@ -151,10 +153,10 @@ namespace Shadowsocks.Controller
             {
                 if (e.Error != null)
                 {
-                    Logging.LogUsefulException(e.Error);
+                    logger.LogUsefulException(e.Error);
                     return;
                 }
-                Logging.Debug($"New version {LatestVersionNumber}{LatestVersionSuffix} found: {LatestVersionLocalName}");
+                logger.Debug($"New version {LatestVersionNumber}{LatestVersionSuffix} found: {LatestVersionLocalName}");
                 if (CheckUpdateCompleted != null)
                 {
                     CheckUpdateCompleted(this, new EventArgs());
@@ -162,7 +164,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception ex)
             {
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
             }
         }
 
diff --git a/shadowsocks-csharp/Controller/ShadowsocksController.cs b/shadowsocks-csharp/Controller/ShadowsocksController.cs
index 66a42f6f..f4ea1294 100644
--- a/shadowsocks-csharp/Controller/ShadowsocksController.cs
+++ b/shadowsocks-csharp/Controller/ShadowsocksController.cs
@@ -9,7 +9,7 @@ using System.Text;
 using System.Threading;
 using System.Web;
 using System.Windows.Forms;
-
+using NLog;
 using Shadowsocks.Controller.Service;
 using Shadowsocks.Controller.Strategy;
 using Shadowsocks.Model;
@@ -19,6 +19,8 @@ namespace Shadowsocks.Controller
 {
     public class ShadowsocksController
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         // controller:
         // handle user actions
         // manipulates UI
@@ -95,6 +97,11 @@ namespace Shadowsocks.Controller
             _pluginsByServer = new ConcurrentDictionary<Server, Sip003Plugin>();
             StartReleasingMemory();
             StartTrafficStatistics(61);
+
+            ProgramUpdated += (o, e) =>
+            {
+                logger.Info($"Updated from {e.OldVersion} to {e.NewVersion}");
+            };
         }
 
         public void Start(bool regHotkeys = true)
@@ -184,13 +191,13 @@ namespace Shadowsocks.Controller
             {
                 if (plugin.StartIfNeeded())
                 {
-                    Logging.Info(
+                    logger.Info(
                         $"Started SIP003 plugin for {server.Identifier()} on {plugin.LocalEndPoint} - PID: {plugin.ProcessId}");
                 }
             }
             catch (Exception ex)
             {
-                Logging.Error("Failed to start SIP003 plugin: " + ex.Message);
+                logger.Error("Failed to start SIP003 plugin: " + ex.Message);
                 throw;
             }
 
@@ -232,7 +239,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 return false;
             }
         }
@@ -271,6 +278,7 @@ namespace Shadowsocks.Controller
         {
             _config.isVerboseLogging = enabled;
             SaveConfig(_config);
+            NLogConfig.LoadConfiguration(); // reload nlog
 
             VerboseLoggingStatusChanged?.Invoke(this, new EventArgs());
         }
@@ -494,6 +502,9 @@ namespace Shadowsocks.Controller
             Encryption.RNG.Reload();
             // some logic in configuration updated the config when saving, we need to read it again
             _config = Configuration.Load();
+
+            NLogConfig.LoadConfiguration();
+
             StatisticsConfiguration = StatisticsStrategyConfiguration.Load();
 
             privoxyRunner = privoxyRunner ?? new PrivoxyRunner();
@@ -552,7 +563,7 @@ namespace Shadowsocks.Controller
                         e = new Exception(I18N.GetString("Port {0} is reserved by system", _config.localPort), e);
                     }
                 }
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 ReportError(e);
             }
 
diff --git a/shadowsocks-csharp/Controller/Strategy/HighAvailabilityStrategy.cs b/shadowsocks-csharp/Controller/Strategy/HighAvailabilityStrategy.cs
index 9804fad2..61356543 100644
--- a/shadowsocks-csharp/Controller/Strategy/HighAvailabilityStrategy.cs
+++ b/shadowsocks-csharp/Controller/Strategy/HighAvailabilityStrategy.cs
@@ -1,4 +1,5 @@
-using Shadowsocks.Model;
+using NLog;
+using Shadowsocks.Model;
 using System;
 using System.Collections.Generic;
 using System.Net;
@@ -8,6 +9,8 @@ namespace Shadowsocks.Controller.Strategy
 {
     class HighAvailabilityStrategy : IStrategy
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         protected ServerStatus _currentServer;
         protected Dictionary<Server, ServerStatus> _serverStatus;
         ShadowsocksController _controller;
@@ -111,7 +114,7 @@ namespace Shadowsocks.Controller.Strategy
                     100 * 1000 * Math.Min(5 * 60, (now - status.lastFailure).TotalSeconds)
                     -2 * 5 * (Math.Min(2000, status.latency.TotalMilliseconds) / (1 + (now - status.lastTimeDetectLatency).TotalSeconds / 30 / 10) +
                     -0.5 * 200 * Math.Min(5, (status.lastRead - status.lastWrite).TotalSeconds));
-                Logging.Debug(String.Format("server: {0} latency:{1} score: {2}", status.server.FriendlyName(), status.latency, status.score));
+                logger.Debug(String.Format("server: {0} latency:{1} score: {2}", status.server.FriendlyName(), status.latency, status.score));
             }
             ServerStatus max = null;
             foreach (var status in servers)
@@ -133,14 +136,14 @@ namespace Shadowsocks.Controller.Strategy
                 if (_currentServer == null || max.score - _currentServer.score > 200)
                 {
                     _currentServer = max;
-                    Logging.Info($"HA switching to server: {_currentServer.server.FriendlyName()}");
+                    logger.Info($"HA switching to server: {_currentServer.server.FriendlyName()}");
                 }
             }
         }
 
         public void UpdateLatency(Model.Server server, TimeSpan latency)
         {
-            Logging.Debug($"latency: {server.FriendlyName()} {latency}");
+            logger.Debug($"latency: {server.FriendlyName()} {latency}");
 
             ServerStatus status;
             if (_serverStatus.TryGetValue(server, out status))
@@ -152,7 +155,7 @@ namespace Shadowsocks.Controller.Strategy
 
         public void UpdateLastRead(Model.Server server)
         {
-            Logging.Debug($"last read: {server.FriendlyName()}");
+            logger.Debug($"last read: {server.FriendlyName()}");
 
             ServerStatus status;
             if (_serverStatus.TryGetValue(server, out status))
@@ -163,7 +166,7 @@ namespace Shadowsocks.Controller.Strategy
 
         public void UpdateLastWrite(Model.Server server)
         {
-            Logging.Debug($"last write: {server.FriendlyName()}");
+            logger.Debug($"last write: {server.FriendlyName()}");
 
             ServerStatus status;
             if (_serverStatus.TryGetValue(server, out status))
@@ -174,7 +177,7 @@ namespace Shadowsocks.Controller.Strategy
 
         public void SetFailure(Model.Server server)
         {
-            Logging.Debug($"failure: {server.FriendlyName()}");
+            logger.Debug($"failure: {server.FriendlyName()}");
 
             ServerStatus status;
             if (_serverStatus.TryGetValue(server, out status))
diff --git a/shadowsocks-csharp/Controller/Strategy/StatisticsStrategy.cs b/shadowsocks-csharp/Controller/Strategy/StatisticsStrategy.cs
index d965a083..57f37989 100644
--- a/shadowsocks-csharp/Controller/Strategy/StatisticsStrategy.cs
+++ b/shadowsocks-csharp/Controller/Strategy/StatisticsStrategy.cs
@@ -5,7 +5,7 @@ using System.Net;
 using System.Threading;
 
 using Newtonsoft.Json;
-
+using NLog;
 using Shadowsocks.Model;
 
 namespace Shadowsocks.Controller.Strategy
@@ -14,6 +14,8 @@ namespace Shadowsocks.Controller.Strategy
 
     internal class StatisticsStrategy : IStrategy, IDisposable
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private readonly ShadowsocksController _controller;
         private Server _currentServer;
         private readonly Timer _timer;
@@ -34,7 +36,7 @@ namespace Shadowsocks.Controller.Strategy
 
         private void ReloadStatisticsAndChooseAServer(object obj)
         {
-            Logging.Debug("Reloading statistics and choose a new server....");
+            logger.Debug("Reloading statistics and choose a new server....");
             var servers = _controller.GetCurrentConfiguration().configs;
             LoadStatistics();
             ChooseNewServer(servers);
@@ -74,7 +76,7 @@ namespace Shadowsocks.Controller.Strategy
 
             if (score != null)
             {
-                Logging.Debug($"Highest score: {score} {JsonConvert.SerializeObject(averageRecord, Formatting.Indented)}");
+                logger.Debug($"Highest score: {score} {JsonConvert.SerializeObject(averageRecord, Formatting.Indented)}");
             }
             return score;
         }
@@ -112,7 +114,7 @@ namespace Shadowsocks.Controller.Strategy
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -145,7 +147,7 @@ namespace Shadowsocks.Controller.Strategy
 
         public void SetFailure(Server server)
         {
-            Logging.Debug($"failure: {server.FriendlyName()}");
+            logger.Debug($"failure: {server.FriendlyName()}");
         }
 
         public void UpdateLastRead(Server server)
diff --git a/shadowsocks-csharp/Controller/System/AutoStartup.cs b/shadowsocks-csharp/Controller/System/AutoStartup.cs
index 310a3c71..c1d207e0 100644
--- a/shadowsocks-csharp/Controller/System/AutoStartup.cs
+++ b/shadowsocks-csharp/Controller/System/AutoStartup.cs
@@ -5,12 +5,15 @@ using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Windows.Forms;
 using Microsoft.Win32;
+using NLog;
 using Shadowsocks.Util;
 
 namespace Shadowsocks.Controller
 {
     static class AutoStartup
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         // Don't use Application.ExecutablePath
         // see https://stackoverflow.com/questions/12945805/odd-c-sharp-path-issue
         private static readonly string ExecutablePath = Assembly.GetEntryAssembly().Location;
@@ -25,7 +28,7 @@ namespace Shadowsocks.Controller
                 runKey = Utils.OpenRegKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);
                 if (runKey == null)
                 {
-                    Logging.Error(@"Cannot find HKCU\Software\Microsoft\Windows\CurrentVersion\Run");
+                    logger.Error(@"Cannot find HKCU\Software\Microsoft\Windows\CurrentVersion\Run");
                     return false;
                 }
                 if (enabled)
@@ -42,7 +45,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 return false;
             }
             finally
@@ -55,7 +58,7 @@ namespace Shadowsocks.Controller
                         runKey.Dispose();
                     }
                     catch (Exception e)
-                    { Logging.LogUsefulException(e); }
+                    { logger.LogUsefulException(e); }
                 }
             }
         }
@@ -68,7 +71,7 @@ namespace Shadowsocks.Controller
                 runKey = Utils.OpenRegKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);
                 if (runKey == null)
                 {
-                    Logging.Error(@"Cannot find HKCU\Software\Microsoft\Windows\CurrentVersion\Run");
+                    logger.Error(@"Cannot find HKCU\Software\Microsoft\Windows\CurrentVersion\Run");
                     return false;
                 }
                 string[] runList = runKey.GetValueNames();
@@ -91,7 +94,7 @@ namespace Shadowsocks.Controller
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 return false;
             }
             finally
@@ -104,7 +107,7 @@ namespace Shadowsocks.Controller
                         runKey.Dispose();
                     }
                     catch (Exception e)
-                    { Logging.LogUsefulException(e); }
+                    { logger.LogUsefulException(e); }
                 }
             }
         }
@@ -140,13 +143,13 @@ namespace Shadowsocks.Controller
                 // first parameter is process command line parameter
                 // needn't include the name of the executable in the command line
                 RegisterApplicationRestart(cmdline, (int)(ApplicationRestartFlags.RESTART_NO_CRASH | ApplicationRestartFlags.RESTART_NO_HANG));
-                Logging.Debug("Register restart after system reboot, command line:" + cmdline);
+                logger.Debug("Register restart after system reboot, command line:" + cmdline);
             }
             // requested unregister, which has no side effect
             else if (!register)
             {
                 UnregisterApplicationRestart();
-                Logging.Debug("Unregister restart after system reboot");
+                logger.Debug("Unregister restart after system reboot");
             }
         }
     }
diff --git a/shadowsocks-csharp/Controller/System/SystemProxy.cs b/shadowsocks-csharp/Controller/System/SystemProxy.cs
index fa7d6853..1d61dd86 100644
--- a/shadowsocks-csharp/Controller/System/SystemProxy.cs
+++ b/shadowsocks-csharp/Controller/System/SystemProxy.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Windows.Forms;
+using NLog;
 using Shadowsocks.Model;
 using Shadowsocks.Util.SystemProxy;
 
@@ -7,6 +8,8 @@ namespace Shadowsocks.Controller
 {
     public static class SystemProxy
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private static string GetTimestamp(DateTime value)
         {
             return value.ToString("yyyyMMddHHmmssfff");
@@ -52,7 +55,7 @@ namespace Shadowsocks.Controller
             }
             catch (ProxyException ex)
             {
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
                 if (ex.Type != ProxyExceptionType.Unspecific && !noRetry)
                 {
                     var ret = MessageBox.Show(I18N.GetString("Error occured when process proxy setting, do you want reset current setting and retry?"), I18N.GetString("Shadowsocks"), MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
diff --git a/shadowsocks-csharp/Data/NLog.config b/shadowsocks-csharp/Data/NLog.config
new file mode 100644
index 00000000..05509cff
--- /dev/null
+++ b/shadowsocks-csharp/Data/NLog.config
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Warning: Configuration may reset after shadowsocks upgrade. -->
+<!-- If you messed it up, delete this file and Shadowsocks will create a new one. -->
+<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <targets>
+    <!-- This line is managed by Shadowsocks. Do not modify it unless you know what you are doing.-->
+    <target name="file" xsi:type="File" fileName="ss_win_temp\shadowsocks.log" writeBom="false" encoding="utf-8"/>
+  </targets>
+  <rules>
+    <!-- This line is managed by Shadowsocks. Do not modify it unless you know what you are doing. -->
+    <logger name="*" minlevel="Info" writeTo="file"/>
+  </rules>
+</nlog>
\ No newline at end of file
diff --git a/shadowsocks-csharp/Data/i18n.csv b/shadowsocks-csharp/Data/i18n.csv
index 3db1ef8f..f2bf8a29 100644
--- a/shadowsocks-csharp/Data/i18n.csv
+++ b/shadowsocks-csharp/Data/i18n.csv
@@ -1,4 +1,4 @@
-en,ru-RU,zh-CN,zh-TW,ja
+en,ru-RU,zh-CN,zh-TW,ja
 #Restart program to apply translation,,,,
 #This is comment line,,,,
 #Always keep language name at head of file,,,,
@@ -75,6 +75,7 @@ Apply,Применить,应用,應用,適用
 New server,Новый сервер,未配置的服务器,新伺服器,新規サーバー
 Move &Up,Выше,上移(&U),上移 (&U),上に移動 (&U)
 Move D&own,Ниже,下移(&O),下移 (&O),下に移動 (&O)
+deprecated,Устаревшее,不推荐,不推薦,非推奨
 ,,,,
 #Statistics Config,,,,
 ,,,,
diff --git a/shadowsocks-csharp/Encryption/AEAD/AEADEncryptor.cs b/shadowsocks-csharp/Encryption/AEAD/AEADEncryptor.cs
index a4e42eae..2acd54bd 100644
--- a/shadowsocks-csharp/Encryption/AEAD/AEADEncryptor.cs
+++ b/shadowsocks-csharp/Encryption/AEAD/AEADEncryptor.cs
@@ -1,4 +1,5 @@
-using System;
+using NLog;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Net;
@@ -13,6 +14,7 @@ namespace Shadowsocks.Encryption.AEAD
     public abstract class AEADEncryptor
         : EncryptorBase
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
         // We are using the same saltLen and keyLen
         private const string Info = "ss-subkey";
         private static readonly byte[] InfoBytes = Encoding.ASCII.GetBytes(Info);
@@ -122,7 +124,7 @@ namespace Shadowsocks.Encryption.AEAD
                 _decryptSalt = new byte[saltLen];
                 Array.Copy(salt, _decryptSalt, saltLen);
             }
-            Logging.Dump("Salt", salt, saltLen);
+            logger.Dump("Salt", salt, saltLen);
         }
 
         public static void randBytes(byte[] buf, int length) { RNG.GetBytes(buf, length); }
@@ -139,7 +141,7 @@ namespace Shadowsocks.Encryption.AEAD
 
             _encCircularBuffer.Put(buf, 0, length);
             outlength = 0;
-            Logging.Debug("---Start Encryption");
+            logger.Debug("---Start Encryption");
             if (! _encryptSaltSent) {
                 _encryptSaltSent = true;
                 // Generate salt
@@ -148,7 +150,7 @@ namespace Shadowsocks.Encryption.AEAD
                 InitCipher(saltBytes, true, false);
                 Array.Copy(saltBytes, 0, outbuf, 0, saltLen);
                 outlength = saltLen;
-                Logging.Debug($"_encryptSaltSent outlength {outlength}");
+                logger.Debug($"_encryptSaltSent outlength {outlength}");
             }
 
             if (! _tcpRequestSent) {
@@ -161,7 +163,7 @@ namespace Shadowsocks.Encryption.AEAD
                 Debug.Assert(encAddrBufLength == AddrBufLength + tagLen * 2 + CHUNK_LEN_BYTES);
                 Array.Copy(encAddrBufBytes, 0, outbuf, outlength, encAddrBufLength);
                 outlength += encAddrBufLength;
-                Logging.Debug($"_tcpRequestSent outlength {outlength}");
+                logger.Debug($"_tcpRequestSent outlength {outlength}");
             }
 
             // handle other chunks
@@ -176,15 +178,15 @@ namespace Shadowsocks.Encryption.AEAD
                 Debug.Assert(encChunkLength == chunklength + tagLen * 2 + CHUNK_LEN_BYTES);
                 Buffer.BlockCopy(encChunkBytes, 0, outbuf, outlength, encChunkLength);
                 outlength += encChunkLength;
-                Logging.Debug("chunks enc outlength " + outlength);
+                logger.Debug("chunks enc outlength " + outlength);
                 // check if we have enough space for outbuf
                 if (outlength + TCPHandler.ChunkOverheadSize > TCPHandler.BufferSize) {
-                    Logging.Debug("enc outbuf almost full, giving up");
+                    logger.Debug("enc outbuf almost full, giving up");
                     return;
                 }
                 bufSize = (uint)_encCircularBuffer.Size;
                 if (bufSize <= 0) {
-                    Logging.Debug("No more data to encrypt, leaving");
+                    logger.Debug("No more data to encrypt, leaving");
                     return;
                 }
             }
@@ -199,7 +201,7 @@ namespace Shadowsocks.Encryption.AEAD
             // drop all into buffer
             _decCircularBuffer.Put(buf, 0, length);
 
-            Logging.Debug("---Start Decryption");
+            logger.Debug("---Start Decryption");
             if (! _decryptSaltReceived) {
                 bufSize = _decCircularBuffer.Size;
                 // check if we get the leading salt
@@ -210,7 +212,7 @@ namespace Shadowsocks.Encryption.AEAD
                 _decryptSaltReceived = true;
                 byte[] salt = _decCircularBuffer.Get(saltLen);
                 InitCipher(salt, false, false);
-                Logging.Debug("get salt len " + saltLen);
+                logger.Debug("get salt len " + saltLen);
             }
 
             // handle chunks
@@ -218,7 +220,7 @@ namespace Shadowsocks.Encryption.AEAD
                 bufSize = _decCircularBuffer.Size;
                 // check if we have any data
                 if (bufSize <= 0) {
-                    Logging.Debug("No data in _decCircularBuffer");
+                    logger.Debug("No data in _decCircularBuffer");
                     return;
                 }
 
@@ -241,13 +243,13 @@ namespace Shadowsocks.Encryption.AEAD
                 if (chunkLen > CHUNK_LEN_MASK)
                 {
                     // we get invalid chunk
-                    Logging.Error($"Invalid chunk length: {chunkLen}");
+                    logger.Error($"Invalid chunk length: {chunkLen}");
                     throw new CryptoErrorException();
                 }
-                Logging.Debug("Get the real chunk len:" + chunkLen);
+                logger.Debug("Get the real chunk len:" + chunkLen);
                 bufSize = _decCircularBuffer.Size;
                 if (bufSize < CHUNK_LEN_BYTES + tagLen /* we haven't remove them */+ chunkLen + tagLen) {
-                    Logging.Debug("No more data to decrypt one chunk");
+                    logger.Debug("No more data to decrypt one chunk");
                     return;
                 }
                 IncrementNonce(false);
@@ -267,16 +269,16 @@ namespace Shadowsocks.Encryption.AEAD
                 // output to outbuf
                 Buffer.BlockCopy(decChunkBytes, 0, outbuf, outlength, (int) decChunkLen);
                 outlength += (int)decChunkLen;
-                Logging.Debug("aead dec outlength " + outlength);
+                logger.Debug("aead dec outlength " + outlength);
                 if (outlength + 100 > TCPHandler.BufferSize)
                 {
-                    Logging.Debug("dec outbuf almost full, giving up");
+                    logger.Debug("dec outbuf almost full, giving up");
                     return;
                 }
                 bufSize = _decCircularBuffer.Size;
                 // check if we already done all of them
                 if (bufSize <= 0) {
-                    Logging.Debug("No data in _decCircularBuffer, already all done");
+                    logger.Debug("No data in _decCircularBuffer, already all done");
                     return;
                 }
             }
@@ -319,7 +321,7 @@ namespace Shadowsocks.Encryption.AEAD
         private void ChunkEncrypt(byte[] plaintext, int plainLen, byte[] ciphertext, out int cipherLen)
         {
             if (plainLen > CHUNK_LEN_MASK) {
-                Logging.Error("enc chunk too big");
+                logger.Error("enc chunk too big");
                 throw new CryptoErrorException();
             }
 
diff --git a/shadowsocks-csharp/Encryption/AEAD/AEADSodiumEncryptor.cs b/shadowsocks-csharp/Encryption/AEAD/AEADSodiumEncryptor.cs
index 2aa2856f..06aef5d7 100644
--- a/shadowsocks-csharp/Encryption/AEAD/AEADSodiumEncryptor.cs
+++ b/shadowsocks-csharp/Encryption/AEAD/AEADSodiumEncryptor.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using NLog;
 using Shadowsocks.Controller;
 using Shadowsocks.Encryption.Exception;
 
@@ -9,6 +10,8 @@ namespace Shadowsocks.Encryption.AEAD
     public class AEADSodiumEncryptor
         : AEADEncryptor, IDisposable
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const int CIPHER_CHACHA20IETFPOLY1305 = 1;
         private const int CIPHER_XCHACHA20IETFPOLY1305 = 2;
         private const int CIPHER_AES256GCM = 3;
@@ -55,9 +58,9 @@ namespace Shadowsocks.Encryption.AEAD
             // outbuf: ciphertext + tag
             int ret;
             ulong encClen = 0;
-            Logging.Dump("_encNonce before enc", _encNonce, nonceLen);
-            Logging.Dump("_sodiumEncSubkey", _sodiumEncSubkey, keyLen);
-            Logging.Dump("before cipherEncrypt: plain", plaintext, (int) plen);
+            logger.Dump("_encNonce before enc", _encNonce, nonceLen);
+            logger.Dump("_sodiumEncSubkey", _sodiumEncSubkey, keyLen);
+            logger.Dump("before cipherEncrypt: plain", plaintext, (int) plen);
             switch (_cipher)
             {
                 case CIPHER_CHACHA20IETFPOLY1305:
@@ -85,7 +88,7 @@ namespace Shadowsocks.Encryption.AEAD
                     throw new System.Exception("not implemented");
             }
             if (ret != 0) throw new CryptoErrorException(String.Format("ret is {0}", ret));
-            Logging.Dump("after cipherEncrypt: cipher", ciphertext, (int) encClen);
+            logger.Dump("after cipherEncrypt: cipher", ciphertext, (int) encClen);
             clen = (uint) encClen;
         }
 
@@ -96,9 +99,9 @@ namespace Shadowsocks.Encryption.AEAD
             // outbuf: plaintext
             int ret;
             ulong decPlen = 0;
-            Logging.Dump("_decNonce before dec", _decNonce, nonceLen);
-            Logging.Dump("_sodiumDecSubkey", _sodiumDecSubkey, keyLen);
-            Logging.Dump("before cipherDecrypt: cipher", ciphertext, (int) clen);
+            logger.Dump("_decNonce before dec", _decNonce, nonceLen);
+            logger.Dump("_sodiumDecSubkey", _sodiumDecSubkey, keyLen);
+            logger.Dump("before cipherDecrypt: cipher", ciphertext, (int) clen);
             switch (_cipher)
             {
                 case CIPHER_CHACHA20IETFPOLY1305:
@@ -127,7 +130,7 @@ namespace Shadowsocks.Encryption.AEAD
             }
 
             if (ret != 0) throw new CryptoErrorException(String.Format("ret is {0}", ret));
-            Logging.Dump("after cipherDecrypt: plain", plaintext, (int) decPlen);
+            logger.Dump("after cipherDecrypt: plain", plaintext, (int) decPlen);
             plen = (uint) decPlen;
         }
 
diff --git a/shadowsocks-csharp/Encryption/MbedTLS.cs b/shadowsocks-csharp/Encryption/MbedTLS.cs
index 4e0b76d8..be681670 100644
--- a/shadowsocks-csharp/Encryption/MbedTLS.cs
+++ b/shadowsocks-csharp/Encryption/MbedTLS.cs
@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Runtime.InteropServices;
+using NLog;
 using Shadowsocks.Controller;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
@@ -9,6 +10,8 @@ namespace Shadowsocks.Encryption
 {
     public static class MbedTLS
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const string DLLNAME = "libsscrypto.dll";
 
         public const int MBEDTLS_ENCRYPT = 1;
@@ -26,7 +29,7 @@ namespace Shadowsocks.Encryption
             }
             catch (System.Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
             LoadLibrary(dllPath);
         }
diff --git a/shadowsocks-csharp/Encryption/OpenSSL.cs b/shadowsocks-csharp/Encryption/OpenSSL.cs
index c88404ed..00056a04 100644
--- a/shadowsocks-csharp/Encryption/OpenSSL.cs
+++ b/shadowsocks-csharp/Encryption/OpenSSL.cs
@@ -3,6 +3,7 @@ using System.IO;
 using System.Runtime.InteropServices;
 using System.Security;
 using System.Text;
+using NLog;
 using Shadowsocks.Controller;
 using Shadowsocks.Encryption.Exception;
 using Shadowsocks.Properties;
@@ -13,6 +14,8 @@ namespace Shadowsocks.Encryption
     // XXX: only for OpenSSL 1.1.0 and higher
     public static class OpenSSL
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const string DLLNAME = "libsscrypto.dll";
 
         public const int OPENSSL_ENCRYPT = 1;
@@ -34,7 +37,7 @@ namespace Shadowsocks.Encryption
             }
             catch (System.Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
             LoadLibrary(dllPath);
         }
diff --git a/shadowsocks-csharp/Encryption/Sodium.cs b/shadowsocks-csharp/Encryption/Sodium.cs
index 66b1abbe..6b9441dd 100755
--- a/shadowsocks-csharp/Encryption/Sodium.cs
+++ b/shadowsocks-csharp/Encryption/Sodium.cs
@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Runtime.InteropServices;
+using NLog;
 using Shadowsocks.Controller;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
@@ -9,6 +10,8 @@ namespace Shadowsocks.Encryption
 {
     public static class Sodium
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const string DLLNAME = "libsscrypto.dll";
 
         private static bool _initialized = false;
@@ -28,7 +31,7 @@ namespace Shadowsocks.Encryption
             }
             catch (System.Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
             LoadLibrary(dllPath);
 
@@ -46,7 +49,7 @@ namespace Shadowsocks.Encryption
                     }
 
                     AES256GCMAvailable = crypto_aead_aes256gcm_is_available() == 1;
-                    Logging.Debug($"sodium: AES256GCMAvailable is {AES256GCMAvailable}");
+                    logger.Debug($"sodium: AES256GCMAvailable is {AES256GCMAvailable}");
                 }
             }
         }
diff --git a/shadowsocks-csharp/Model/Configuration.cs b/shadowsocks-csharp/Model/Configuration.cs
index 23523416..9eb50a09 100644
--- a/shadowsocks-csharp/Model/Configuration.cs
+++ b/shadowsocks-csharp/Model/Configuration.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using Newtonsoft.Json;
+using NLog;
 using Shadowsocks.Controller;
 
 namespace Shadowsocks.Model
@@ -9,6 +10,9 @@ namespace Shadowsocks.Model
     [Serializable]
     public class Configuration
     {
+        [JsonIgnore]
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public string version;
 
         public List<Server> configs;
@@ -32,10 +36,14 @@ namespace Shadowsocks.Model
         public bool autoCheckUpdate;
         public bool checkPreRelease;
         public bool isVerboseLogging;
+        //public NLogConfig.LogLevel logLevel;
         public LogViewerConfig logViewer;
         public ProxyConfig proxy;
         public HotkeyConfig hotkey;
 
+        [JsonIgnore]
+        NLogConfig nLogConfig;
+
         private static readonly string CONFIG_FILE = "gui-config.json";
 
         [JsonIgnore]
@@ -110,12 +118,35 @@ namespace Shadowsocks.Model
 
                 config.proxy.CheckConfig();
 
+                try
+                {
+                    config.nLogConfig = NLogConfig.LoadXML();
+                    switch (config.nLogConfig.GetLogLevel())
+                    {
+                        case NLogConfig.LogLevel.Fatal:
+                        case NLogConfig.LogLevel.Error:
+                        case NLogConfig.LogLevel.Warn:
+                        case NLogConfig.LogLevel.Info:
+                            config.isVerboseLogging = false;
+                            break;
+                        case NLogConfig.LogLevel.Debug:
+                        case NLogConfig.LogLevel.Trace:
+                            config.isVerboseLogging = true;
+                            break;
+                    }
+                }
+                catch (Exception e)
+                {
+                    // todo: route the error to UI since there is no log file in this scenario
+                    logger.Error(e, "Cannot get the log level from NLog config file. Please check if the nlog config file exists with corresponding XML nodes.");
+                }
+
                 return config;
             }
             catch (Exception e)
             {
                 if (!(e is FileNotFoundException))
-                    Logging.LogUsefulException(e);
+                    logger.LogUsefulException(e);
                 return new Configuration
                 {
                     index = 0,
@@ -128,7 +159,7 @@ namespace Shadowsocks.Model
                     },
                     logViewer = new LogViewerConfig(),
                     proxy = new ProxyConfig(),
-                    hotkey = new HotkeyConfig()
+                    hotkey = new HotkeyConfig(),
                 };
             }
         }
@@ -151,10 +182,20 @@ namespace Shadowsocks.Model
                     sw.Write(jsonString);
                     sw.Flush();
                 }
+                try
+                {             
+                    // apply changs to NLog.config
+                    config.nLogConfig.SetLogLevel(config.isVerboseLogging? NLogConfig.LogLevel.Trace: NLogConfig.LogLevel.Info);
+                    NLogConfig.SaveXML(config.nLogConfig);
+                }
+                catch(Exception e)
+                {
+                    logger.Error(e, "Cannot set the log level to NLog config file. Please check if the nlog config file exists with corresponding XML nodes.");
+                }
             }
             catch (IOException e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
diff --git a/shadowsocks-csharp/Model/NlogConfig.cs b/shadowsocks-csharp/Model/NlogConfig.cs
new file mode 100644
index 00000000..11d6d858
--- /dev/null
+++ b/shadowsocks-csharp/Model/NlogConfig.cs
@@ -0,0 +1,126 @@
+using NLog;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+
+namespace Shadowsocks.Model
+{
+    public class NLogConfig
+    {
+        public enum LogLevel
+        {
+            Fatal,
+            Error,
+            Warn,
+            Info,
+            Debug,
+            Trace,
+        }
+
+        const string NLOG_CONFIG_FILE_NAME = "NLog.config";
+        const string TARGET_MIN_LEVEL_ATTRIBUTE = "minlevel";
+        const string LOGGER_FILE_NAME_ATTRIBUTE = "fileName";
+
+        XmlDocument doc = new XmlDocument();
+        XmlElement logFileNameElement;
+        XmlElement logLevelElement;
+
+        /// <summary>
+        /// Load the NLog config xml file content
+        /// </summary>
+        public static NLogConfig LoadXML()
+        {
+            NLogConfig config = new NLogConfig();
+            config.doc.Load(NLOG_CONFIG_FILE_NAME);
+            config.logLevelElement = (XmlElement)SelectSingleNode(config.doc, "//nlog:logger[@name='*']");
+            config.logFileNameElement = (XmlElement)SelectSingleNode(config.doc, "//nlog:target[@name='file']");
+            return config;
+        }
+
+        /// <summary>
+        /// Save the content to NLog config xml file
+        /// </summary>
+        public static void SaveXML(NLogConfig nLogConfig)
+        {
+            nLogConfig.doc.Save(NLOG_CONFIG_FILE_NAME);
+        }
+
+
+        /// <summary>
+        /// Get the current minLogLevel from xml file
+        /// </summary>
+        /// <returns></returns>
+        public LogLevel GetLogLevel()
+        {
+            LogLevel level = LogLevel.Warn;
+            string levelStr = logLevelElement.GetAttribute(TARGET_MIN_LEVEL_ATTRIBUTE);
+            Enum.TryParse(levelStr, out level);
+            return level;
+        }
+
+        /// <summary>
+        /// Get the target fileName from xml file
+        /// </summary>
+        /// <returns></returns>
+        public string GetLogFileName()
+        {
+            return logFileNameElement.GetAttribute(LOGGER_FILE_NAME_ATTRIBUTE);
+        }
+
+        /// <summary>
+        /// Set the minLogLevel to xml file
+        /// </summary>
+        /// <param name="logLevel"></param>
+        public void SetLogLevel(LogLevel logLevel)
+        {
+            logLevelElement.SetAttribute(TARGET_MIN_LEVEL_ATTRIBUTE, logLevel.ToString("G"));
+        }
+
+        /// <summary>
+        /// Set the target fileName to xml file
+        /// </summary>
+        /// <param name="fileName"></param>
+        public void SetLogFileName(string fileName)
+        {
+            logFileNameElement.SetAttribute(LOGGER_FILE_NAME_ATTRIBUTE, fileName);
+        }
+
+        /// <summary>
+        /// Select a single XML node/elemant
+        /// </summary>
+        /// <param name="doc"></param>
+        /// <param name="xpath"></param>
+        /// <returns></returns>
+        private static XmlNode SelectSingleNode(XmlDocument doc, string xpath)
+        {
+            XmlNamespaceManager manager = new XmlNamespaceManager(doc.NameTable);
+            manager.AddNamespace("nlog", "http://www.nlog-project.org/schemas/NLog.xsd");
+            //return doc.SelectSingleNode("//nlog:logger[(@shadowsocks='managed') and (@name='*')]", manager);
+            return doc.SelectSingleNode(xpath, manager);
+        }
+
+        /// <summary>
+        /// Extract the pre-defined NLog configuration file is does not exist. Then reload the Nlog configuration.
+        /// </summary>
+        public static void TouchAndApplyNLogConfig()
+        {
+            if (!File.Exists(NLOG_CONFIG_FILE_NAME))
+            {
+                File.WriteAllText(NLOG_CONFIG_FILE_NAME, Properties.Resources.NLog_config);
+                LogManager.LoadConfiguration(NLOG_CONFIG_FILE_NAME);
+            }
+        }
+
+        /// <summary>
+        /// NLog reload the config file and apply to current LogManager
+        /// </summary>
+        public static void LoadConfiguration()
+        {
+            LogManager.LoadConfiguration(NLOG_CONFIG_FILE_NAME);
+        }
+    }
+}
diff --git a/shadowsocks-csharp/Model/StatisticsStrategyConfiguration.cs b/shadowsocks-csharp/Model/StatisticsStrategyConfiguration.cs
index c648027d..e0f3bf2d 100644
--- a/shadowsocks-csharp/Model/StatisticsStrategyConfiguration.cs
+++ b/shadowsocks-csharp/Model/StatisticsStrategyConfiguration.cs
@@ -5,7 +5,7 @@ using System.Linq;
 using System.Reflection;
 
 using Newtonsoft.Json;
-
+using NLog;
 using Shadowsocks.Controller;
 
 namespace Shadowsocks.Model
@@ -13,6 +13,8 @@ namespace Shadowsocks.Model
     [Serializable]
     public class StatisticsStrategyConfiguration
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         public static readonly string ID = "com.shadowsocks.strategy.statistics";
         public bool StatisticsEnabled { get; set; } = false;
         public bool ByHourOfDay { get; set; } = true;
@@ -39,7 +41,7 @@ namespace Shadowsocks.Model
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 return new StatisticsStrategyConfiguration();
             }
         }
@@ -53,7 +55,7 @@ namespace Shadowsocks.Model
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
diff --git a/shadowsocks-csharp/Program.cs b/shadowsocks-csharp/Program.cs
index 63485522..e24ab322 100755
--- a/shadowsocks-csharp/Program.cs
+++ b/shadowsocks-csharp/Program.cs
@@ -3,6 +3,7 @@ using System.Diagnostics;
 using System.IO;
 using System.Threading;
 using System.Windows.Forms;
+using NLog;
 using Microsoft.Win32;
 
 using Shadowsocks.Controller;
@@ -14,6 +15,7 @@ namespace Shadowsocks
 {
     static class Program
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
         public static ShadowsocksController MainController { get; private set; }
         public static MenuViewController MenuController { get; private set; }
         public static string[] Args { get; private set; }
@@ -24,6 +26,9 @@ namespace Shadowsocks
         [STAThread]
         static void Main(string[] args)
         {
+            // todo: initialize the NLog configuartion
+            Model.NLogConfig.TouchAndApplyNLogConfig();
+
             // .NET Framework 4.7.2 on Win7 compatibility
             System.Net.ServicePointManager.SecurityProtocol |=
                 System.Net.SecurityProtocolType.Tls | System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls12;
@@ -79,7 +84,6 @@ namespace Shadowsocks
                 }
                 Directory.SetCurrentDirectory(Application.StartupPath);
                 
-                Logging.OpenLogFile();
 #if DEBUG
                 // truncate privoxy log file while debugging
                 string privoxyLogFilename = Utils.GetTempPath("privoxy.log");
@@ -89,11 +93,6 @@ namespace Shadowsocks
                 MainController = new ShadowsocksController();
                 MenuController = new MenuViewController(MainController);
 
-                MainController.ProgramUpdated += (o, e) =>
-                {
-                    Logging.Info($"Updated from {e.OldVersion} to {e.NewVersion}");
-                };
-
                 HotKeys.Init(MainController);
                 MainController.Start();
                 Application.Run();
@@ -106,7 +105,7 @@ namespace Shadowsocks
             if (Interlocked.Increment(ref exited) == 1)
             {
                 string errMsg = e.ExceptionObject.ToString();
-                Logging.Error(errMsg);
+                logger.Error(errMsg);
                 MessageBox.Show(
                     $"{I18N.GetString("Unexpected error, shadowsocks will exit. Please report to")} https://github.com/shadowsocks/shadowsocks-windows/issues {Environment.NewLine}{errMsg}",
                     "Shadowsocks non-UI Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
@@ -119,7 +118,7 @@ namespace Shadowsocks
             if (Interlocked.Increment(ref exited) == 1)
             {
                 string errorMsg = $"Exception Detail: {Environment.NewLine}{e.Exception}";
-                Logging.Error(errorMsg);
+                logger.Error(errorMsg);
                 MessageBox.Show(
                     $"{I18N.GetString("Unexpected error, shadowsocks will exit. Please report to")} https://github.com/shadowsocks/shadowsocks-windows/issues {Environment.NewLine}{errorMsg}",
                     "Shadowsocks UI Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
@@ -132,7 +131,7 @@ namespace Shadowsocks
             switch (e.Mode)
             {
                 case PowerModes.Resume:
-                    Logging.Info("os wake up");
+                    logger.Info("os wake up");
                     if (MainController != null)
                     {
                         System.Threading.Tasks.Task.Factory.StartNew(() =>
@@ -141,11 +140,11 @@ namespace Shadowsocks
                             try
                             {
                                 MainController.Start(false);
-                                Logging.Info("controller started");
+                                logger.Info("controller started");
                             }
                             catch (Exception ex)
                             {
-                                Logging.LogUsefulException(ex);
+                                logger.LogUsefulException(ex);
                             }
                         });
                     }
@@ -154,9 +153,9 @@ namespace Shadowsocks
                     if (MainController != null)
                     {
                         MainController.Stop();
-                        Logging.Info("controller stopped");
+                        logger.Info("controller stopped");
                     }
-                    Logging.Info("os suspend");
+                    logger.Info("os suspend");
                     break;
             }
         }
diff --git a/shadowsocks-csharp/Properties/Resources.Designer.cs b/shadowsocks-csharp/Properties/Resources.Designer.cs
index dea95e63..bc5b8c24 100644
--- a/shadowsocks-csharp/Properties/Resources.Designer.cs
+++ b/shadowsocks-csharp/Properties/Resources.Designer.cs
@@ -1,91 +1,91 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     此代码由工具生成。
-//     运行时版本:4.0.30319.42000
-//
-//     对此文件的更改可能会导致不正确的行为，并且如果
-//     重新生成代码，这些更改将会丢失。
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-namespace Shadowsocks.Properties {
-    using System;
-    
-    
-    /// <summary>
-    ///   一个强类型的资源类，用于查找本地化的字符串等。
-    /// </summary>
-    // 此类是由 StronglyTypedResourceBuilder
-    // 类通过类似于 ResGen 或 Visual Studio 的工具自动生成的。
-    // 若要添加或移除成员，请编辑 .ResX 文件，然后重新运行 ResGen
-    // (以 /str 作为命令选项)，或重新生成 VS 项目。
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]
-    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    internal class Resources {
-        
-        private static global::System.Resources.ResourceManager resourceMan;
-        
-        private static global::System.Globalization.CultureInfo resourceCulture;
-        
-        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-        internal Resources() {
-        }
-        
-        /// <summary>
-        ///   返回此类使用的缓存的 ResourceManager 实例。
-        /// </summary>
-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Resources.ResourceManager ResourceManager {
-            get {
-                if (object.ReferenceEquals(resourceMan, null)) {
-                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Shadowsocks.Properties.Resources", typeof(Resources).Assembly);
-                    resourceMan = temp;
-                }
-                return resourceMan;
-            }
-        }
-        
-        /// <summary>
-        ///   重写当前线程的 CurrentUICulture 属性
-        ///   重写当前线程的 CurrentUICulture 属性。
-        /// </summary>
-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Globalization.CultureInfo Culture {
-            get {
-                return resourceCulture;
-            }
-            set {
-                resourceCulture = value;
-            }
-        }
-        
-        /// <summary>
-        ///   查找类似 /* eslint-disable */
-        ///// Was generated by gfwlist2pac in precise mode
-        ///// https://github.com/clowwindy/gfwlist2pac
-        ///
-        ///// 2019-10-06: More &apos;javascript&apos; way to interaction with main program
-        ///// 2019-02-08: Updated to support shadowsocks-windows user rules.
-        ///
-        ///var proxy = __PROXY__;
-        ///var userrules = __USERRULES__;
-        ///var rules = __RULES__;
-        ///
-        ////*
-        ///* This file is part of Adblock Plus &lt;http://adblockplus.org/&gt;,
-        ///* Copyright (C) 2006-2014 Eyeo GmbH
-        ///*
-        ///* Adblock Plus is free software: you can redistribute it and/or  [字符串的其余部分被截断]&quot;; 的本地化字符串。
-        /// </summary>
-        internal static string abp_js {
-            get {
-                return ResourceManager.GetString("abp_js", resourceCulture);
-            }
-        }
-        
-        /// <summary>
-        ///   查找类似 var __USERRULES__ = [];
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Shadowsocks.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Shadowsocks.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to /* eslint-disable */
+        ///// Was generated by gfwlist2pac in precise mode
+        ///// https://github.com/clowwindy/gfwlist2pac
+        ///
+        ///// 2019-10-06: More &apos;javascript&apos; way to interaction with main program
+        ///// 2019-02-08: Updated to support shadowsocks-windows user rules.
+        ///
+        ///var proxy = __PROXY__;
+        ///var userrules = __USERRULES__;
+        ///var rules = __RULES__;
+        ///
+        ////*
+        ///* This file is part of Adblock Plus &lt;http://adblockplus.org/&gt;,
+        ///* Copyright (C) 2006-2014 Eyeo GmbH
+        ///*
+        ///* Adblock Plus is free software: you can redistribute it and/or  [rest of string was truncated]&quot;;.
+        /// </summary>
+        internal static string abp_js {
+            get {
+                return ResourceManager.GetString("abp_js", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to var __USERRULES__ = [];
         ///var __RULES__ = [
         ///    &quot;|http://85.17.73.31/&quot;,
         ///    &quot;||agnesb.fr&quot;,
@@ -106,154 +106,175 @@ namespace Shadowsocks.Properties {
         ///    &quot;||beeg.com&quot;,
         ///    &quot;||global.bing.com&quot;,
         ///    &quot;||bloombergview.com&quot;,
-        ///    &quot; [字符串的其余部分被截断]&quot;; 的本地化字符串。
-        /// </summary>
-        internal static string default_abp_rule {
-            get {
-                return ResourceManager.GetString("default_abp_rule", resourceCulture);
-            }
-        }
-        
-        /// <summary>
-        ///   查找类似 en,zh-CN,zh-TW,ja
+        ///    &quot;||booktopia.com.au&quot;,
+        /// [rest of string was truncated]&quot;;.
+        /// </summary>
+        internal static string default_abp_rule {
+            get {
+                return ResourceManager.GetString("default_abp_rule", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to en,zh-CN,zh-TW,ja
+        ///#Restart program to apply translation,,,
+        ///#This is comment line,,,
+        ///#Always keep language name at head of file,,,
+        ///#Language name is output in log,,,
+        ///&quot;#You can find it by search &quot;&quot;Current language is:&quot;&quot;&quot;,,,
+        ///#Please use UTF-8 with BOM encoding so we can edit it in Excel,,,
         ///,,,
         ///Shadowsocks,Shadowsocks,Shadowsocks,Shadowsocks
         ///,,,
+        ///#Menu,,,
+        ///,,,
         ///System Proxy,系统代理,系統代理,システムプロキシ
         ///Disable,禁用,禁用,無効
         ///PAC,PAC 模式,PAC 模式,PAC
         ///Global,全局模式,全局模式,全般
         ///Servers,服务器,伺服器,サーバー
-        ///Edit Servers...,编辑服务器...,編輯伺服器...,サーバーの編集...
-        ///Statistics Config...,统计配置...,統計設定檔...,統計情報の設定...
-        ///Start on Boot,开机启动,開機啟動,システムと同時に起動
-        ///Forward Proxy...,正向代理设置...,正向 Proxy 設定...,フォワードプロキシの設定...
-        ///Allow other Devices to connect,允许其他设备连入,允許其他裝置連入,他のデバイスからの接続を許可する
-        ///Local PAC,使用本地 PAC,使用本機 PAC,ローカル PAC
-        ///Online PAC,使用在线 PAC,使 [字符串的其余部分被截断]&quot;; 的本地化字符串。
-        /// </summary>
-        internal static string i18n_csv {
-            get {
-                return ResourceManager.GetString("i18n_csv", resourceCulture);
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Byte[] 类型的本地化资源。
-        /// </summary>
-        internal static byte[] libsscrypto_dll {
-            get {
-                object obj = ResourceManager.GetObject("libsscrypto_dll", resourceCulture);
-                return ((byte[])(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找类似 listen-address __PRIVOXY_BIND_IP__:__PRIVOXY_BIND_PORT__
-        ///toggle 0
-        ///logfile ss_privoxy.log
-        ///show-on-task-bar 0
-        ///activity-animation 0
-        ///forward-socks5 / __SOCKS_HOST__:__SOCKS_PORT__ .
-        ///max-client-connections 2048
-        ///hide-console
-        /// 的本地化字符串。
-        /// </summary>
-        internal static string privoxy_conf {
-            get {
-                return ResourceManager.GetString("privoxy_conf", resourceCulture);
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Byte[] 类型的本地化资源。
-        /// </summary>
-        internal static byte[] privoxy_exe {
-            get {
-                object obj = ResourceManager.GetObject("privoxy_exe", resourceCulture);
-                return ((byte[])(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
-        /// </summary>
-        internal static System.Drawing.Bitmap ss32Fill {
-            get {
-                object obj = ResourceManager.GetObject("ss32Fill", resourceCulture);
-                return ((System.Drawing.Bitmap)(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
-        /// </summary>
-        internal static System.Drawing.Bitmap ss32In {
-            get {
-                object obj = ResourceManager.GetObject("ss32In", resourceCulture);
-                return ((System.Drawing.Bitmap)(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
-        /// </summary>
-        internal static System.Drawing.Bitmap ss32Out {
-            get {
-                object obj = ResourceManager.GetObject("ss32Out", resourceCulture);
-                return ((System.Drawing.Bitmap)(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
-        /// </summary>
-        internal static System.Drawing.Bitmap ss32Outline {
-            get {
-                object obj = ResourceManager.GetObject("ss32Outline", resourceCulture);
-                return ((System.Drawing.Bitmap)(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
-        /// </summary>
-        internal static System.Drawing.Bitmap ssw128 {
-            get {
-                object obj = ResourceManager.GetObject("ssw128", resourceCulture);
-                return ((System.Drawing.Bitmap)(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Byte[] 类型的本地化资源。
-        /// </summary>
-        internal static byte[] sysproxy_exe {
-            get {
-                object obj = ResourceManager.GetObject("sysproxy_exe", resourceCulture);
-                return ((byte[])(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找 System.Byte[] 类型的本地化资源。
-        /// </summary>
-        internal static byte[] sysproxy64_exe {
-            get {
-                object obj = ResourceManager.GetObject("sysproxy64_exe", resourceCulture);
-                return ((byte[])(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   查找类似 ! Put user rules line by line in this file.
-        ///! See https://adblockplus.org/en/filter-cheatsheet
-        /// 的本地化字符串。
-        /// </summary>
-        internal static string user_rule {
-            get {
-                return ResourceManager.GetString("user_rule", resourceCulture);
-            }
-        }
-    }
-}
+        ///Edit Servers...,编辑服务器...,編輯伺服器...,サーバーの編集.. [rest of string was truncated]&quot;;.
+        /// </summary>
+        internal static string i18n_csv {
+            get {
+                return ResourceManager.GetString("i18n_csv", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] libsscrypto_dll {
+            get {
+                object obj = ResourceManager.GetObject("libsscrypto_dll", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot; ?&gt;
+        ///&lt;nlog xmlns=&quot;http://www.nlog-project.org/schemas/NLog.xsd&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;&gt;
+        ///  &lt;targets&gt;
+        ///    &lt;target name=&quot;file&quot; xsi:type=&quot;File&quot; fileName=&quot;shadowsocks.log&quot;/&gt;
+        ///    
+        ///  &lt;/targets&gt;
+        ///  &lt;rules&gt;
+        ///    &lt;logger name=&quot;Name.Space.Class1&quot; minlevel=&quot;Debug&quot; writeTo=&quot;f1&quot; /&gt;
+        ///  &lt;/rules&gt;
+        ///&lt;/nlog&gt;.
+        /// </summary>
+        internal static string NLog_config {
+            get {
+                return ResourceManager.GetString("NLog_config", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to listen-address __PRIVOXY_BIND_IP__:__PRIVOXY_BIND_PORT__
+        ///toggle 0
+        ///logfile ss_privoxy.log
+        ///show-on-task-bar 0
+        ///activity-animation 0
+        ///forward-socks5 / __SOCKS_HOST__:__SOCKS_PORT__ .
+        ///max-client-connections 2048
+        ///hide-console
+        ///.
+        /// </summary>
+        internal static string privoxy_conf {
+            get {
+                return ResourceManager.GetString("privoxy_conf", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] privoxy_exe {
+            get {
+                object obj = ResourceManager.GetObject("privoxy_exe", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap ss32Fill {
+            get {
+                object obj = ResourceManager.GetObject("ss32Fill", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap ss32In {
+            get {
+                object obj = ResourceManager.GetObject("ss32In", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap ss32Out {
+            get {
+                object obj = ResourceManager.GetObject("ss32Out", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap ss32Outline {
+            get {
+                object obj = ResourceManager.GetObject("ss32Outline", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap ssw128 {
+            get {
+                object obj = ResourceManager.GetObject("ssw128", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] sysproxy_exe {
+            get {
+                object obj = ResourceManager.GetObject("sysproxy_exe", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] sysproxy64_exe {
+            get {
+                object obj = ResourceManager.GetObject("sysproxy64_exe", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to ! Put user rules line by line in this file.
+        ///! See https://adblockplus.org/en/filter-cheatsheet
+        ///.
+        /// </summary>
+        internal static string user_rule {
+            get {
+                return ResourceManager.GetString("user_rule", resourceCulture);
+            }
+        }
+    }
+}
diff --git a/shadowsocks-csharp/Properties/Resources.resx b/shadowsocks-csharp/Properties/Resources.resx
index 9661ee9a..99f2c596 100755
--- a/shadowsocks-csharp/Properties/Resources.resx
+++ b/shadowsocks-csharp/Properties/Resources.resx
@@ -130,6 +130,9 @@
   <data name="libsscrypto_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Data\libsscrypto.dll.gz;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </data>
+  <data name="NLog_config" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\data\nlog.config;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;utf-8</value>
+  </data>
   <data name="privoxy_conf" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\data\privoxy_conf.txt;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;utf-8</value>
   </data>
diff --git a/shadowsocks-csharp/Proxy/HttpProxy.cs b/shadowsocks-csharp/Proxy/HttpProxy.cs
index b7d671a6..ecf7dc89 100644
--- a/shadowsocks-csharp/Proxy/HttpProxy.cs
+++ b/shadowsocks-csharp/Proxy/HttpProxy.cs
@@ -4,6 +4,7 @@ using System.Net.Sockets;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading;
+using NLog;
 using Shadowsocks.Controller;
 using Shadowsocks.Util.Sockets;
 
@@ -11,6 +12,8 @@ namespace Shadowsocks.Proxy
 {
     public class HttpProxy : IProxy
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private class FakeAsyncResult : IAsyncResult
         {
             public readonly HttpState innerState;
@@ -179,7 +182,7 @@ namespace Shadowsocks.Proxy
 
         private bool OnLineRead(string line, object state)
         {
-            Logging.Debug(line);
+            logger.Debug(line);
 
             if (_respondLineCount == 0)
             {
diff --git a/shadowsocks-csharp/Util/ProcessManagement/Job.cs b/shadowsocks-csharp/Util/ProcessManagement/Job.cs
index dd82134d..bb05dccb 100644
--- a/shadowsocks-csharp/Util/ProcessManagement/Job.cs
+++ b/shadowsocks-csharp/Util/ProcessManagement/Job.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Diagnostics;
 using System.Runtime.InteropServices;
+using NLog;
 using Shadowsocks.Controller;
 
 namespace Shadowsocks.Util.ProcessManagement
@@ -11,6 +12,8 @@ namespace Shadowsocks.Util.ProcessManagement
      */
     public class Job : IDisposable
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private IntPtr handle = IntPtr.Zero;
 
         public Job()
@@ -54,7 +57,7 @@ namespace Shadowsocks.Util.ProcessManagement
 
             if (!succ)
             {
-                Logging.Error("Failed to call AssignProcessToJobObject! GetLastError=" + Marshal.GetLastWin32Error());
+                logger.Error("Failed to call AssignProcessToJobObject! GetLastError=" + Marshal.GetLastWin32Error());
             }
 
             return succ;
diff --git a/shadowsocks-csharp/Util/SystemProxy/Sysproxy.cs b/shadowsocks-csharp/Util/SystemProxy/Sysproxy.cs
index 863be1df..b1ffcac4 100644
--- a/shadowsocks-csharp/Util/SystemProxy/Sysproxy.cs
+++ b/shadowsocks-csharp/Util/SystemProxy/Sysproxy.cs
@@ -1,4 +1,5 @@
 using Newtonsoft.Json;
+using NLog;
 using Shadowsocks.Controller;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
@@ -14,6 +15,8 @@ namespace Shadowsocks.Util.SystemProxy
 {
     public static class Sysproxy
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private const string _userWininetConfigFile = "user-wininet.json";
 
         private readonly static string[] _lanIP = {
@@ -70,7 +73,7 @@ namespace Shadowsocks.Util.SystemProxy
             }
             catch (IOException e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
@@ -233,7 +236,7 @@ namespace Shadowsocks.Util.SystemProxy
             }
             catch (IOException e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
             }
         }
 
diff --git a/shadowsocks-csharp/Util/Util.cs b/shadowsocks-csharp/Util/Util.cs
index 56f1e0b1..8912eb68 100755
--- a/shadowsocks-csharp/Util/Util.cs
+++ b/shadowsocks-csharp/Util/Util.cs
@@ -1,4 +1,5 @@
-using System;
+using NLog;
+using System;
 using System.Diagnostics;
 using System.IO;
 using System.IO.Compression;
@@ -26,6 +27,8 @@ namespace Shadowsocks.Util
 
     public static class Utils
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         private static string _tempPath = null;
 
         // return path to store temporary files
@@ -48,7 +51,7 @@ namespace Shadowsocks.Util
                 }
                 catch (Exception e)
                 {
-                    Logging.Error(e);
+                    logger.Error(e);
                     throw;
                 }
             }
@@ -58,7 +61,7 @@ namespace Shadowsocks.Util
         public enum WindowsThemeMode { Dark, Light }
 
         // Support on Windows 10 1903+
-        public static WindowsThemeMode GetWindows10SystemThemeSetting(bool isVerbose)
+        public static WindowsThemeMode GetWindows10SystemThemeSetting()
         {
             WindowsThemeMode themeMode = WindowsThemeMode.Dark;
             try
@@ -78,11 +81,10 @@ namespace Shadowsocks.Util
             }
             catch
             {
-                if (isVerbose)
-                {
-                    Logging.Info(
-                            $"Cannot get Windows 10 system theme mode, return default value 0 (dark mode).");
-                }
+
+                logger.Debug(
+                        $"Cannot get Windows 10 system theme mode, return default value 0 (dark mode).");
+
             }
             return themeMode;
         }
@@ -251,7 +253,7 @@ namespace Shadowsocks.Util
             }
             catch (Exception e)
             {
-                Logging.LogUsefulException(e);
+                logger.LogUsefulException(e);
                 return null;
             }
         }
diff --git a/shadowsocks-csharp/View/ConfigForm.Designer.cs b/shadowsocks-csharp/View/ConfigForm.Designer.cs
index fafbca48..bc21915a 100755
--- a/shadowsocks-csharp/View/ConfigForm.Designer.cs
+++ b/shadowsocks-csharp/View/ConfigForm.Designer.cs
@@ -106,10 +106,10 @@
             this.tableLayoutPanel1.Controls.Add(this.PluginArgumentsLabel, 0, 8);
             this.tableLayoutPanel1.Controls.Add(this.RemarksLabel, 0, 10);
             this.tableLayoutPanel1.Controls.Add(this.NeedPluginArgCheckBox, 1, 7);
-            this.tableLayoutPanel1.Location = new System.Drawing.Point(8, 21);
+            this.tableLayoutPanel1.Location = new System.Drawing.Point(10, 26);
             this.tableLayoutPanel1.Margin = new System.Windows.Forms.Padding(0);
             this.tableLayoutPanel1.Name = "tableLayoutPanel1";
-            this.tableLayoutPanel1.Padding = new System.Windows.Forms.Padding(3);
+            this.tableLayoutPanel1.Padding = new System.Windows.Forms.Padding(4);
             this.tableLayoutPanel1.RowCount = 12;
             this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
@@ -123,16 +123,17 @@
             this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel1.Size = new System.Drawing.Size(279, 292);
+            this.tableLayoutPanel1.Size = new System.Drawing.Size(394, 357);
             this.tableLayoutPanel1.TabIndex = 0;
             // 
             // PluginOptionsLabel
             // 
             this.PluginOptionsLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.PluginOptionsLabel.AutoSize = true;
-            this.PluginOptionsLabel.Location = new System.Drawing.Point(18, 166);
+            this.PluginOptionsLabel.Location = new System.Drawing.Point(24, 203);
+            this.PluginOptionsLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.PluginOptionsLabel.Name = "PluginOptionsLabel";
-            this.PluginOptionsLabel.Size = new System.Drawing.Size(89, 12);
+            this.PluginOptionsLabel.Size = new System.Drawing.Size(119, 15);
             this.PluginOptionsLabel.TabIndex = 6;
             this.PluginOptionsLabel.Text = "Plugin Options";
             this.toolTip1.SetToolTip(this.PluginOptionsLabel, "Environment variables for plugin program");
@@ -140,20 +141,22 @@
             // PluginTextBox
             // 
             this.PluginTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.PluginTextBox.Location = new System.Drawing.Point(113, 135);
+            this.PluginTextBox.Location = new System.Drawing.Point(151, 165);
+            this.PluginTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.PluginTextBox.MaxLength = 256;
             this.PluginTextBox.Name = "PluginTextBox";
-            this.PluginTextBox.Size = new System.Drawing.Size(160, 21);
+            this.PluginTextBox.Size = new System.Drawing.Size(235, 25);
             this.PluginTextBox.TabIndex = 5;
             this.PluginTextBox.WordWrap = false;
             // 
             // RemarksTextBox
             // 
             this.RemarksTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.RemarksTextBox.Location = new System.Drawing.Point(113, 238);
+            this.RemarksTextBox.Location = new System.Drawing.Point(151, 291);
+            this.RemarksTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.RemarksTextBox.MaxLength = 32;
             this.RemarksTextBox.Name = "RemarksTextBox";
-            this.RemarksTextBox.Size = new System.Drawing.Size(160, 21);
+            this.RemarksTextBox.Size = new System.Drawing.Size(235, 25);
             this.RemarksTextBox.TabIndex = 8;
             this.RemarksTextBox.WordWrap = false;
             // 
@@ -161,9 +164,10 @@
             // 
             this.IPLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.IPLabel.AutoSize = true;
-            this.IPLabel.Location = new System.Drawing.Point(48, 10);
+            this.IPLabel.Location = new System.Drawing.Point(64, 13);
+            this.IPLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.IPLabel.Name = "IPLabel";
-            this.IPLabel.Size = new System.Drawing.Size(59, 12);
+            this.IPLabel.Size = new System.Drawing.Size(79, 15);
             this.IPLabel.TabIndex = 0;
             this.IPLabel.Text = "Server IP";
             // 
@@ -171,9 +175,10 @@
             // 
             this.ServerPortLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.ServerPortLabel.AutoSize = true;
-            this.ServerPortLabel.Location = new System.Drawing.Point(36, 37);
+            this.ServerPortLabel.Location = new System.Drawing.Point(48, 46);
+            this.ServerPortLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.ServerPortLabel.Name = "ServerPortLabel";
-            this.ServerPortLabel.Size = new System.Drawing.Size(71, 12);
+            this.ServerPortLabel.Size = new System.Drawing.Size(95, 15);
             this.ServerPortLabel.TabIndex = 1;
             this.ServerPortLabel.Text = "Server Port";
             // 
@@ -181,9 +186,10 @@
             // 
             this.PasswordLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.PasswordLabel.AutoSize = true;
-            this.PasswordLabel.Location = new System.Drawing.Point(54, 64);
+            this.PasswordLabel.Location = new System.Drawing.Point(72, 79);
+            this.PasswordLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.PasswordLabel.Name = "PasswordLabel";
-            this.PasswordLabel.Size = new System.Drawing.Size(53, 12);
+            this.PasswordLabel.Size = new System.Drawing.Size(71, 15);
             this.PasswordLabel.TabIndex = 2;
             this.PasswordLabel.Text = "Password";
             this.PasswordLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
@@ -191,30 +197,34 @@
             // IPTextBox
             // 
             this.IPTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.IPTextBox.Location = new System.Drawing.Point(113, 6);
+            this.IPTextBox.Location = new System.Drawing.Point(151, 8);
+            this.IPTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.IPTextBox.MaxLength = 512;
             this.IPTextBox.Name = "IPTextBox";
-            this.IPTextBox.Size = new System.Drawing.Size(160, 21);
+            this.IPTextBox.Size = new System.Drawing.Size(235, 25);
             this.IPTextBox.TabIndex = 0;
             this.IPTextBox.WordWrap = false;
             // 
             // ServerPortTextBox
             // 
             this.ServerPortTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.ServerPortTextBox.Location = new System.Drawing.Point(113, 33);
+            this.ServerPortTextBox.Location = new System.Drawing.Point(151, 41);
+            this.ServerPortTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.ServerPortTextBox.MaxLength = 10;
             this.ServerPortTextBox.Name = "ServerPortTextBox";
-            this.ServerPortTextBox.Size = new System.Drawing.Size(160, 21);
+            this.ServerPortTextBox.Size = new System.Drawing.Size(235, 25);
             this.ServerPortTextBox.TabIndex = 1;
             this.ServerPortTextBox.WordWrap = false;
             // 
             // PasswordTextBox
             // 
             this.PasswordTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.PasswordTextBox.Location = new System.Drawing.Point(113, 60);
+            this.PasswordTextBox.Font = new System.Drawing.Font("Consolas", 9F);
+            this.PasswordTextBox.Location = new System.Drawing.Point(151, 74);
+            this.PasswordTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.PasswordTextBox.MaxLength = 256;
             this.PasswordTextBox.Name = "PasswordTextBox";
-            this.PasswordTextBox.Size = new System.Drawing.Size(160, 21);
+            this.PasswordTextBox.Size = new System.Drawing.Size(235, 25);
             this.PasswordTextBox.TabIndex = 2;
             this.PasswordTextBox.UseSystemPasswordChar = true;
             this.PasswordTextBox.WordWrap = false;
@@ -223,9 +233,10 @@
             // 
             this.EncryptionLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.EncryptionLabel.AutoSize = true;
-            this.EncryptionLabel.Location = new System.Drawing.Point(42, 113);
+            this.EncryptionLabel.Location = new System.Drawing.Point(56, 138);
+            this.EncryptionLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.EncryptionLabel.Name = "EncryptionLabel";
-            this.EncryptionLabel.Size = new System.Drawing.Size(65, 12);
+            this.EncryptionLabel.Size = new System.Drawing.Size(87, 15);
             this.EncryptionLabel.TabIndex = 4;
             this.EncryptionLabel.Text = "Encryption";
             // 
@@ -236,69 +247,54 @@
             this.EncryptionSelect.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
             this.EncryptionSelect.FormattingEnabled = true;
             this.EncryptionSelect.ImeMode = System.Windows.Forms.ImeMode.NoControl;
-            this.EncryptionSelect.ItemHeight = 12;
-            this.EncryptionSelect.Items.AddRange(new object[] {
-            "rc4-md5",
-            "salsa20",
-            "chacha20",
-            "chacha20-ietf",
-            "aes-256-cfb",
-            "aes-192-cfb",
-            "aes-128-cfb",
-            "aes-256-ctr",
-            "aes-192-ctr",
-            "aes-128-ctr",
-            "bf-cfb",
-            "camellia-128-cfb",
-            "camellia-192-cfb",
-            "camellia-256-cfb",
-            "aes-128-gcm",
-            "aes-192-gcm",
-            "aes-256-gcm",
-            "chacha20-ietf-poly1305",
-            "xchacha20-ietf-poly1305"});
-            this.EncryptionSelect.Location = new System.Drawing.Point(113, 109);
+            this.EncryptionSelect.ItemHeight = 15;
+            this.EncryptionSelect.Location = new System.Drawing.Point(151, 134);
+            this.EncryptionSelect.Margin = new System.Windows.Forms.Padding(4);
             this.EncryptionSelect.Name = "EncryptionSelect";
-            this.EncryptionSelect.Size = new System.Drawing.Size(160, 20);
+            this.EncryptionSelect.Size = new System.Drawing.Size(235, 23);
             this.EncryptionSelect.TabIndex = 4;
             // 
             // TimeoutLabel
             // 
             this.TimeoutLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.TimeoutLabel.AutoSize = true;
-            this.TimeoutLabel.Location = new System.Drawing.Point(30, 269);
+            this.TimeoutLabel.Location = new System.Drawing.Point(40, 329);
+            this.TimeoutLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.TimeoutLabel.Name = "TimeoutLabel";
             this.TimeoutLabel.RightToLeft = System.Windows.Forms.RightToLeft.No;
-            this.TimeoutLabel.Size = new System.Drawing.Size(77, 12);
+            this.TimeoutLabel.Size = new System.Drawing.Size(103, 15);
             this.TimeoutLabel.TabIndex = 9;
             this.TimeoutLabel.Text = "Timeout(Sec)";
             // 
             // TimeoutTextBox
             // 
             this.TimeoutTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.TimeoutTextBox.Location = new System.Drawing.Point(113, 265);
+            this.TimeoutTextBox.Location = new System.Drawing.Point(151, 324);
+            this.TimeoutTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.TimeoutTextBox.MaxLength = 5;
             this.TimeoutTextBox.Name = "TimeoutTextBox";
-            this.TimeoutTextBox.Size = new System.Drawing.Size(160, 21);
+            this.TimeoutTextBox.Size = new System.Drawing.Size(235, 25);
             this.TimeoutTextBox.TabIndex = 9;
             // 
             // PluginLabel
             // 
             this.PluginLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.PluginLabel.AutoSize = true;
-            this.PluginLabel.Location = new System.Drawing.Point(18, 139);
+            this.PluginLabel.Location = new System.Drawing.Point(24, 170);
+            this.PluginLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.PluginLabel.Name = "PluginLabel";
-            this.PluginLabel.Size = new System.Drawing.Size(89, 12);
+            this.PluginLabel.Size = new System.Drawing.Size(119, 15);
             this.PluginLabel.TabIndex = 5;
             this.PluginLabel.Text = "Plugin Program";
             // 
             // PluginOptionsTextBox
             // 
             this.PluginOptionsTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.PluginOptionsTextBox.Location = new System.Drawing.Point(113, 162);
+            this.PluginOptionsTextBox.Location = new System.Drawing.Point(151, 198);
+            this.PluginOptionsTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.PluginOptionsTextBox.MaxLength = 256;
             this.PluginOptionsTextBox.Name = "PluginOptionsTextBox";
-            this.PluginOptionsTextBox.Size = new System.Drawing.Size(160, 21);
+            this.PluginOptionsTextBox.Size = new System.Drawing.Size(235, 25);
             this.PluginOptionsTextBox.TabIndex = 6;
             this.PluginOptionsTextBox.WordWrap = false;
             // 
@@ -307,9 +303,10 @@
             this.ShowPasswdCheckBox.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
             | System.Windows.Forms.AnchorStyles.Left)));
             this.ShowPasswdCheckBox.AutoSize = true;
-            this.ShowPasswdCheckBox.Location = new System.Drawing.Point(113, 87);
+            this.ShowPasswdCheckBox.Location = new System.Drawing.Point(151, 107);
+            this.ShowPasswdCheckBox.Margin = new System.Windows.Forms.Padding(4);
             this.ShowPasswdCheckBox.Name = "ShowPasswdCheckBox";
-            this.ShowPasswdCheckBox.Size = new System.Drawing.Size(102, 16);
+            this.ShowPasswdCheckBox.Size = new System.Drawing.Size(133, 19);
             this.ShowPasswdCheckBox.TabIndex = 3;
             this.ShowPasswdCheckBox.Text = "Show Password";
             this.ShowPasswdCheckBox.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
@@ -319,10 +316,11 @@
             // PluginArgumentsTextBox
             // 
             this.PluginArgumentsTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.PluginArgumentsTextBox.Location = new System.Drawing.Point(113, 211);
+            this.PluginArgumentsTextBox.Location = new System.Drawing.Point(151, 258);
+            this.PluginArgumentsTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.PluginArgumentsTextBox.MaxLength = 512;
             this.PluginArgumentsTextBox.Name = "PluginArgumentsTextBox";
-            this.PluginArgumentsTextBox.Size = new System.Drawing.Size(160, 21);
+            this.PluginArgumentsTextBox.Size = new System.Drawing.Size(235, 25);
             this.PluginArgumentsTextBox.TabIndex = 7;
             this.PluginArgumentsTextBox.WordWrap = false;
             // 
@@ -330,9 +328,10 @@
             // 
             this.PluginArgumentsLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.PluginArgumentsLabel.AutoSize = true;
-            this.PluginArgumentsLabel.Location = new System.Drawing.Point(6, 215);
+            this.PluginArgumentsLabel.Location = new System.Drawing.Point(8, 263);
+            this.PluginArgumentsLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.PluginArgumentsLabel.Name = "PluginArgumentsLabel";
-            this.PluginArgumentsLabel.Size = new System.Drawing.Size(101, 12);
+            this.PluginArgumentsLabel.Size = new System.Drawing.Size(135, 15);
             this.PluginArgumentsLabel.TabIndex = 7;
             this.PluginArgumentsLabel.Text = "Plugin Arguments";
             this.toolTip1.SetToolTip(this.PluginArgumentsLabel, "Not a SIP003 standard. Used as CLI arguments.\r\nMandatory:\r\n%SS_LOCAL_HOST%, %SS_L" +
@@ -342,18 +341,20 @@
             // 
             this.RemarksLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.RemarksLabel.AutoSize = true;
-            this.RemarksLabel.Location = new System.Drawing.Point(60, 242);
+            this.RemarksLabel.Location = new System.Drawing.Point(80, 296);
+            this.RemarksLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.RemarksLabel.Name = "RemarksLabel";
-            this.RemarksLabel.Size = new System.Drawing.Size(47, 12);
+            this.RemarksLabel.Size = new System.Drawing.Size(63, 15);
             this.RemarksLabel.TabIndex = 8;
             this.RemarksLabel.Text = "Remarks";
             // 
             // NeedPluginArgCheckBox
             // 
             this.NeedPluginArgCheckBox.AutoSize = true;
-            this.NeedPluginArgCheckBox.Location = new System.Drawing.Point(113, 189);
+            this.NeedPluginArgCheckBox.Location = new System.Drawing.Point(151, 231);
+            this.NeedPluginArgCheckBox.Margin = new System.Windows.Forms.Padding(4);
             this.NeedPluginArgCheckBox.Name = "NeedPluginArgCheckBox";
-            this.NeedPluginArgCheckBox.Size = new System.Drawing.Size(144, 16);
+            this.NeedPluginArgCheckBox.Size = new System.Drawing.Size(189, 19);
             this.NeedPluginArgCheckBox.TabIndex = 10;
             this.NeedPluginArgCheckBox.Text = "Need Plugin Argument";
             this.NeedPluginArgCheckBox.UseVisualStyleBackColor = true;
@@ -364,7 +365,8 @@
             this.panel2.Anchor = System.Windows.Forms.AnchorStyles.Top;
             this.panel2.AutoSize = true;
             this.panel2.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
-            this.panel2.Location = new System.Drawing.Point(165, 187);
+            this.panel2.Location = new System.Drawing.Point(206, 234);
+            this.panel2.Margin = new System.Windows.Forms.Padding(4);
             this.panel2.Name = "panel2";
             this.panel2.Size = new System.Drawing.Size(0, 0);
             this.panel2.TabIndex = 1;
@@ -373,10 +375,10 @@
             // 
             this.OKButton.DialogResult = System.Windows.Forms.DialogResult.OK;
             this.OKButton.Dock = System.Windows.Forms.DockStyle.Right;
-            this.OKButton.Location = new System.Drawing.Point(3, 3);
-            this.OKButton.Margin = new System.Windows.Forms.Padding(3, 3, 3, 0);
+            this.OKButton.Location = new System.Drawing.Point(4, 4);
+            this.OKButton.Margin = new System.Windows.Forms.Padding(4, 4, 4, 0);
             this.OKButton.Name = "OKButton";
-            this.OKButton.Size = new System.Drawing.Size(75, 23);
+            this.OKButton.Size = new System.Drawing.Size(94, 29);
             this.OKButton.TabIndex = 17;
             this.OKButton.Text = "OK";
             this.OKButton.UseVisualStyleBackColor = true;
@@ -386,10 +388,10 @@
             // 
             this.MyCancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
             this.MyCancelButton.Dock = System.Windows.Forms.DockStyle.Right;
-            this.MyCancelButton.Location = new System.Drawing.Point(84, 3);
-            this.MyCancelButton.Margin = new System.Windows.Forms.Padding(3, 3, 3, 0);
+            this.MyCancelButton.Location = new System.Drawing.Point(106, 4);
+            this.MyCancelButton.Margin = new System.Windows.Forms.Padding(4, 4, 4, 0);
             this.MyCancelButton.Name = "MyCancelButton";
-            this.MyCancelButton.Size = new System.Drawing.Size(75, 23);
+            this.MyCancelButton.Size = new System.Drawing.Size(94, 29);
             this.MyCancelButton.TabIndex = 18;
             this.MyCancelButton.Text = "Cancel";
             this.MyCancelButton.UseVisualStyleBackColor = true;
@@ -399,10 +401,10 @@
             // 
             this.ApplyButton.Dock = System.Windows.Forms.DockStyle.Right;
             this.ApplyButton.Enabled = false;
-            this.ApplyButton.Location = new System.Drawing.Point(165, 3);
-            this.ApplyButton.Margin = new System.Windows.Forms.Padding(3, 3, 0, 0);
+            this.ApplyButton.Location = new System.Drawing.Point(208, 4);
+            this.ApplyButton.Margin = new System.Windows.Forms.Padding(4, 4, 0, 0);
             this.ApplyButton.Name = "ApplyButton";
-            this.ApplyButton.Size = new System.Drawing.Size(75, 23);
+            this.ApplyButton.Size = new System.Drawing.Size(94, 29);
             this.ApplyButton.TabIndex = 19;
             this.ApplyButton.Text = "Apply";
             this.ApplyButton.UseVisualStyleBackColor = true;
@@ -411,10 +413,10 @@
             // DeleteButton
             // 
             this.DeleteButton.Dock = System.Windows.Forms.DockStyle.Right;
-            this.DeleteButton.Location = new System.Drawing.Point(86, 6);
-            this.DeleteButton.Margin = new System.Windows.Forms.Padding(3, 6, 0, 3);
+            this.DeleteButton.Location = new System.Drawing.Point(108, 8);
+            this.DeleteButton.Margin = new System.Windows.Forms.Padding(4, 8, 0, 4);
             this.DeleteButton.Name = "DeleteButton";
-            this.DeleteButton.Size = new System.Drawing.Size(80, 23);
+            this.DeleteButton.Size = new System.Drawing.Size(100, 29);
             this.DeleteButton.TabIndex = 13;
             this.DeleteButton.Text = "&Delete";
             this.DeleteButton.UseVisualStyleBackColor = true;
@@ -423,10 +425,10 @@
             // AddButton
             // 
             this.AddButton.Dock = System.Windows.Forms.DockStyle.Left;
-            this.AddButton.Location = new System.Drawing.Point(0, 6);
-            this.AddButton.Margin = new System.Windows.Forms.Padding(0, 6, 3, 3);
+            this.AddButton.Location = new System.Drawing.Point(0, 8);
+            this.AddButton.Margin = new System.Windows.Forms.Padding(0, 8, 4, 4);
             this.AddButton.Name = "AddButton";
-            this.AddButton.Size = new System.Drawing.Size(80, 23);
+            this.AddButton.Size = new System.Drawing.Size(100, 29);
             this.AddButton.TabIndex = 12;
             this.AddButton.Text = "&Add";
             this.AddButton.UseVisualStyleBackColor = true;
@@ -437,10 +439,11 @@
             this.ServerGroupBox.AutoSize = true;
             this.ServerGroupBox.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
             this.ServerGroupBox.Controls.Add(this.tableLayoutPanel1);
-            this.ServerGroupBox.Location = new System.Drawing.Point(178, 0);
-            this.ServerGroupBox.Margin = new System.Windows.Forms.Padding(12, 0, 0, 0);
+            this.ServerGroupBox.Location = new System.Drawing.Point(223, 0);
+            this.ServerGroupBox.Margin = new System.Windows.Forms.Padding(15, 0, 0, 0);
             this.ServerGroupBox.Name = "ServerGroupBox";
-            this.ServerGroupBox.Size = new System.Drawing.Size(290, 330);
+            this.ServerGroupBox.Padding = new System.Windows.Forms.Padding(4);
+            this.ServerGroupBox.Size = new System.Drawing.Size(408, 405);
             this.ServerGroupBox.TabIndex = 0;
             this.ServerGroupBox.TabStop = false;
             this.ServerGroupBox.Text = "Server";
@@ -449,11 +452,11 @@
             // 
             this.ServersListBox.FormattingEnabled = true;
             this.ServersListBox.IntegralHeight = false;
-            this.ServersListBox.ItemHeight = 12;
+            this.ServersListBox.ItemHeight = 15;
             this.ServersListBox.Location = new System.Drawing.Point(0, 0);
             this.ServersListBox.Margin = new System.Windows.Forms.Padding(0);
             this.ServersListBox.Name = "ServersListBox";
-            this.ServersListBox.Size = new System.Drawing.Size(166, 148);
+            this.ServersListBox.Size = new System.Drawing.Size(206, 184);
             this.ServersListBox.TabIndex = 11;
             this.ServersListBox.SelectedIndexChanged += new System.EventHandler(this.ServersListBox_SelectedIndexChanged);
             // 
@@ -470,14 +473,14 @@
             this.tableLayoutPanel2.Controls.Add(this.ServersListBox, 0, 0);
             this.tableLayoutPanel2.Controls.Add(this.ServerGroupBox, 1, 0);
             this.tableLayoutPanel2.Controls.Add(this.tableLayoutPanel4, 0, 1);
-            this.tableLayoutPanel2.Location = new System.Drawing.Point(12, 12);
+            this.tableLayoutPanel2.Location = new System.Drawing.Point(15, 15);
             this.tableLayoutPanel2.Margin = new System.Windows.Forms.Padding(0);
             this.tableLayoutPanel2.Name = "tableLayoutPanel2";
             this.tableLayoutPanel2.RowCount = 3;
             this.tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel2.Size = new System.Drawing.Size(468, 426);
+            this.tableLayoutPanel2.Size = new System.Drawing.Size(631, 528);
             this.tableLayoutPanel2.TabIndex = 7;
             // 
             // tableLayoutPanel6
@@ -490,21 +493,21 @@
             this.tableLayoutPanel6.Controls.Add(this.MoveDownButton, 1, 0);
             this.tableLayoutPanel6.Controls.Add(this.MoveUpButton, 0, 0);
             this.tableLayoutPanel6.Dock = System.Windows.Forms.DockStyle.Top;
-            this.tableLayoutPanel6.Location = new System.Drawing.Point(0, 394);
+            this.tableLayoutPanel6.Location = new System.Drawing.Point(0, 487);
             this.tableLayoutPanel6.Margin = new System.Windows.Forms.Padding(0);
             this.tableLayoutPanel6.Name = "tableLayoutPanel6";
             this.tableLayoutPanel6.RowCount = 1;
             this.tableLayoutPanel6.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel6.Size = new System.Drawing.Size(166, 32);
+            this.tableLayoutPanel6.Size = new System.Drawing.Size(208, 41);
             this.tableLayoutPanel6.TabIndex = 10;
             // 
             // MoveDownButton
             // 
             this.MoveDownButton.Dock = System.Windows.Forms.DockStyle.Right;
-            this.MoveDownButton.Location = new System.Drawing.Point(86, 6);
-            this.MoveDownButton.Margin = new System.Windows.Forms.Padding(3, 6, 0, 3);
+            this.MoveDownButton.Location = new System.Drawing.Point(108, 8);
+            this.MoveDownButton.Margin = new System.Windows.Forms.Padding(4, 8, 0, 4);
             this.MoveDownButton.Name = "MoveDownButton";
-            this.MoveDownButton.Size = new System.Drawing.Size(80, 23);
+            this.MoveDownButton.Size = new System.Drawing.Size(100, 29);
             this.MoveDownButton.TabIndex = 16;
             this.MoveDownButton.Text = "Move D&own";
             this.MoveDownButton.UseVisualStyleBackColor = true;
@@ -513,10 +516,10 @@
             // MoveUpButton
             // 
             this.MoveUpButton.Dock = System.Windows.Forms.DockStyle.Left;
-            this.MoveUpButton.Location = new System.Drawing.Point(0, 6);
-            this.MoveUpButton.Margin = new System.Windows.Forms.Padding(0, 6, 3, 3);
+            this.MoveUpButton.Location = new System.Drawing.Point(0, 8);
+            this.MoveUpButton.Margin = new System.Windows.Forms.Padding(0, 8, 4, 4);
             this.MoveUpButton.Name = "MoveUpButton";
-            this.MoveUpButton.Size = new System.Drawing.Size(80, 23);
+            this.MoveUpButton.Size = new System.Drawing.Size(100, 29);
             this.MoveUpButton.TabIndex = 15;
             this.MoveUpButton.Text = "Move &Up";
             this.MoveUpButton.UseVisualStyleBackColor = true;
@@ -534,23 +537,24 @@
             this.tableLayoutPanel5.Controls.Add(this.ProxyPortTextBox, 1, 0);
             this.tableLayoutPanel5.Controls.Add(this.ProxyPortLabel, 0, 0);
             this.tableLayoutPanel5.Controls.Add(this.PortableModeCheckBox, 0, 1);
-            this.tableLayoutPanel5.Location = new System.Drawing.Point(166, 330);
+            this.tableLayoutPanel5.Location = new System.Drawing.Point(208, 405);
             this.tableLayoutPanel5.Margin = new System.Windows.Forms.Padding(0);
             this.tableLayoutPanel5.Name = "tableLayoutPanel5";
-            this.tableLayoutPanel5.Padding = new System.Windows.Forms.Padding(3);
+            this.tableLayoutPanel5.Padding = new System.Windows.Forms.Padding(4);
             this.tableLayoutPanel5.RowCount = 2;
             this.tableLayoutPanel5.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel5.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel5.Size = new System.Drawing.Size(196, 64);
+            this.tableLayoutPanel5.Size = new System.Drawing.Size(251, 82);
             this.tableLayoutPanel5.TabIndex = 9;
             // 
             // ProxyPortTextBox
             // 
             this.ProxyPortTextBox.Anchor = System.Windows.Forms.AnchorStyles.Left;
-            this.ProxyPortTextBox.Location = new System.Drawing.Point(77, 6);
+            this.ProxyPortTextBox.Location = new System.Drawing.Point(103, 8);
+            this.ProxyPortTextBox.Margin = new System.Windows.Forms.Padding(4);
             this.ProxyPortTextBox.MaxLength = 10;
             this.ProxyPortTextBox.Name = "ProxyPortTextBox";
-            this.ProxyPortTextBox.Size = new System.Drawing.Size(113, 21);
+            this.ProxyPortTextBox.Size = new System.Drawing.Size(140, 25);
             this.ProxyPortTextBox.TabIndex = 10;
             this.ProxyPortTextBox.WordWrap = false;
             // 
@@ -558,9 +562,10 @@
             // 
             this.ProxyPortLabel.Anchor = System.Windows.Forms.AnchorStyles.Right;
             this.ProxyPortLabel.AutoSize = true;
-            this.ProxyPortLabel.Location = new System.Drawing.Point(6, 10);
+            this.ProxyPortLabel.Location = new System.Drawing.Point(8, 13);
+            this.ProxyPortLabel.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
             this.ProxyPortLabel.Name = "ProxyPortLabel";
-            this.ProxyPortLabel.Size = new System.Drawing.Size(65, 12);
+            this.ProxyPortLabel.Size = new System.Drawing.Size(87, 15);
             this.ProxyPortLabel.TabIndex = 10;
             this.ProxyPortLabel.Text = "Proxy Port";
             // 
@@ -569,9 +574,10 @@
             this.PortableModeCheckBox.Anchor = System.Windows.Forms.AnchorStyles.Left;
             this.PortableModeCheckBox.AutoSize = true;
             this.tableLayoutPanel5.SetColumnSpan(this.PortableModeCheckBox, 2);
-            this.PortableModeCheckBox.Location = new System.Drawing.Point(6, 37);
+            this.PortableModeCheckBox.Location = new System.Drawing.Point(8, 48);
+            this.PortableModeCheckBox.Margin = new System.Windows.Forms.Padding(4);
             this.PortableModeCheckBox.Name = "PortableModeCheckBox";
-            this.PortableModeCheckBox.Size = new System.Drawing.Size(102, 16);
+            this.PortableModeCheckBox.Size = new System.Drawing.Size(133, 19);
             this.PortableModeCheckBox.TabIndex = 11;
             this.PortableModeCheckBox.Text = "Portable Mode";
             this.toolTip1.SetToolTip(this.PortableModeCheckBox, "restart required");
@@ -585,17 +591,17 @@
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
-            this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 20F));
+            this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 25F));
             this.tableLayoutPanel3.Controls.Add(this.MyCancelButton, 1, 0);
             this.tableLayoutPanel3.Controls.Add(this.OKButton, 0, 0);
             this.tableLayoutPanel3.Controls.Add(this.ApplyButton, 2, 0);
             this.tableLayoutPanel3.Dock = System.Windows.Forms.DockStyle.Right;
-            this.tableLayoutPanel3.Location = new System.Drawing.Point(228, 397);
-            this.tableLayoutPanel3.Margin = new System.Windows.Forms.Padding(3, 3, 0, 3);
+            this.tableLayoutPanel3.Location = new System.Drawing.Point(329, 491);
+            this.tableLayoutPanel3.Margin = new System.Windows.Forms.Padding(4, 4, 0, 4);
             this.tableLayoutPanel3.Name = "tableLayoutPanel3";
             this.tableLayoutPanel3.RowCount = 1;
             this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel3.Size = new System.Drawing.Size(240, 26);
+            this.tableLayoutPanel3.Size = new System.Drawing.Size(302, 33);
             this.tableLayoutPanel3.TabIndex = 8;
             // 
             // tableLayoutPanel4
@@ -609,22 +615,22 @@
             this.tableLayoutPanel4.Controls.Add(this.DeleteButton, 1, 0);
             this.tableLayoutPanel4.Controls.Add(this.AddButton, 0, 0);
             this.tableLayoutPanel4.Dock = System.Windows.Forms.DockStyle.Top;
-            this.tableLayoutPanel4.Location = new System.Drawing.Point(0, 330);
+            this.tableLayoutPanel4.Location = new System.Drawing.Point(0, 405);
             this.tableLayoutPanel4.Margin = new System.Windows.Forms.Padding(0);
             this.tableLayoutPanel4.Name = "tableLayoutPanel4";
             this.tableLayoutPanel4.RowCount = 2;
             this.tableLayoutPanel4.RowStyles.Add(new System.Windows.Forms.RowStyle());
             this.tableLayoutPanel4.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel4.Size = new System.Drawing.Size(166, 64);
+            this.tableLayoutPanel4.Size = new System.Drawing.Size(208, 82);
             this.tableLayoutPanel4.TabIndex = 8;
             // 
             // DuplicateButton
             // 
             this.DuplicateButton.Dock = System.Windows.Forms.DockStyle.Left;
-            this.DuplicateButton.Location = new System.Drawing.Point(0, 38);
-            this.DuplicateButton.Margin = new System.Windows.Forms.Padding(0, 6, 3, 3);
+            this.DuplicateButton.Location = new System.Drawing.Point(0, 49);
+            this.DuplicateButton.Margin = new System.Windows.Forms.Padding(0, 8, 4, 4);
             this.DuplicateButton.Name = "DuplicateButton";
-            this.DuplicateButton.Size = new System.Drawing.Size(80, 23);
+            this.DuplicateButton.Size = new System.Drawing.Size(100, 29);
             this.DuplicateButton.TabIndex = 14;
             this.DuplicateButton.Text = "Dupli&cate";
             this.DuplicateButton.UseVisualStyleBackColor = true;
@@ -633,19 +639,20 @@
             // ConfigForm
             // 
             this.AcceptButton = this.OKButton;
-            this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
+            this.AutoScaleDimensions = new System.Drawing.SizeF(120F, 120F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
             this.AutoSize = true;
             this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
             this.CancelButton = this.MyCancelButton;
-            this.ClientSize = new System.Drawing.Size(491, 438);
+            this.ClientSize = new System.Drawing.Size(614, 548);
             this.Controls.Add(this.tableLayoutPanel2);
             this.Controls.Add(this.panel2);
             this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
+            this.Margin = new System.Windows.Forms.Padding(4);
             this.MaximizeBox = false;
             this.MinimizeBox = false;
             this.Name = "ConfigForm";
-            this.Padding = new System.Windows.Forms.Padding(12, 12, 12, 9);
+            this.Padding = new System.Windows.Forms.Padding(15, 15, 15, 11);
             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
             this.Text = "Edit Servers";
             this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.ConfigForm_FormClosed);
diff --git a/shadowsocks-csharp/View/ConfigForm.cs b/shadowsocks-csharp/View/ConfigForm.cs
index 379edc29..caab2f6d 100755
--- a/shadowsocks-csharp/View/ConfigForm.cs
+++ b/shadowsocks-csharp/View/ConfigForm.cs
@@ -2,7 +2,9 @@ using Shadowsocks.Controller;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
 using System;
+using System.Collections.Generic;
 using System.Drawing;
+using System.Linq;
 using System.Windows.Forms;
 
 namespace Shadowsocks.View
@@ -17,10 +19,86 @@ namespace Shadowsocks.View
 
         private bool isChange = false;
 
+        private class EncryptionMethod
+        {
+            public readonly string name;
+            public readonly bool deprecated;
+
+            // Edit here to add/delete encryption method displayed in UI
+            private static string[] deprecatedMethod = new string[]
+            {
+                "rc4-md5",
+                "salsa20",
+                "chacha20",
+                "bf-cfb",
+                "chacha20-ietf",
+                "aes-256-cfb",
+                "aes-192-cfb",
+                "aes-128-cfb",
+                "aes-256-ctr",
+                "aes-192-ctr",
+                "aes-128-ctr",
+                "camellia-256-cfb",
+                "camellia-192-cfb",
+                "camellia-128-cfb",
+            };
+            private static string[] inuseMethod = new string[]
+            {
+                "aes-256-gcm",
+                "aes-192-gcm",
+                "aes-128-gcm",
+                "chacha20-ietf-poly1305",
+                "xchacha20-ietf-poly1305",
+            };
+            public static EncryptionMethod[] AllMethods
+            {
+                get
+                {
+                    if (!init) Init();
+                    return allMethods;
+                }
+            }
+            private static bool init = false;
+            private static EncryptionMethod[] allMethods;
+            private static Dictionary<string, EncryptionMethod> methodByName = new Dictionary<string, EncryptionMethod>();
+            private static void Init()
+            {
+                var all = new List<EncryptionMethod>();
+
+                all.AddRange(inuseMethod.Select(i => new EncryptionMethod(i, false)));
+                all.AddRange(deprecatedMethod.Select(d => new EncryptionMethod(d, true)));
+
+                allMethods = all.ToArray();
+                foreach (var item in all)
+                {
+                    methodByName[item.name] = item;
+                }
+                init = true;
+            }
+
+            public static EncryptionMethod GetMethod(string name)
+            {
+                if (!init) Init();
+                return methodByName[name];
+            }
+
+            private EncryptionMethod(string name, bool deprecated)
+            {
+                this.name = name;
+                this.deprecated = deprecated;
+            }
+
+            public override string ToString()
+            {
+                return deprecated ? $"{name} ({I18N.GetString("deprecated")})" : name;
+            }
+        }
+
         public ConfigForm(ShadowsocksController controller)
         {
             Font = SystemFonts.MessageBoxFont;
             InitializeComponent();
+            EncryptionSelect.Items.AddRange(EncryptionMethod.AllMethods);
 
             // a dirty hack
             ServersListBox.Dock = DockStyle.Fill;
@@ -115,7 +193,7 @@ namespace Shadowsocks.View
                     server = address,
                     server_port = addressPort.Value,
                     password = serverPassword,
-                    method = EncryptionSelect.Text,
+                    method = ((EncryptionMethod)EncryptionSelect.SelectedItem).name,
                     plugin = PluginTextBox.Text,
                     plugin_opts = PluginOptionsTextBox.Text,
                     plugin_args = PluginArgumentsTextBox.Text,
@@ -316,7 +394,7 @@ namespace Shadowsocks.View
             IPTextBox.Text = server.server;
             ServerPortTextBox.Text = server.server_port.ToString();
             PasswordTextBox.Text = server.password;
-            EncryptionSelect.Text = server.method ?? Server.DefaultMethod;
+            EncryptionSelect.SelectedItem = EncryptionMethod.GetMethod(server.method ?? Server.DefaultMethod);
             PluginTextBox.Text = server.plugin;
             PluginOptionsTextBox.Text = server.plugin_opts;
             PluginArgumentsTextBox.Text = server.plugin_args;
diff --git a/shadowsocks-csharp/View/LogForm.cs b/shadowsocks-csharp/View/LogForm.cs
index ba4e76cf..06b0f678 100644
--- a/shadowsocks-csharp/View/LogForm.cs
+++ b/shadowsocks-csharp/View/LogForm.cs
@@ -11,11 +11,14 @@ using Shadowsocks.Properties;
 using Shadowsocks.Model;
 using Shadowsocks.Util;
 using System.Text;
+using NLog;
 
 namespace Shadowsocks.View
 {
     public partial class LogForm : Form
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
+
         long lastOffset;
         string filename;
         Timer timer;
@@ -38,13 +41,27 @@ namespace Shadowsocks.View
         TextAnnotation outboundAnnotation = new TextAnnotation();
         #endregion
 
-        public LogForm(ShadowsocksController controller, string filename)
+        public LogForm(ShadowsocksController controller)
         {
             this.controller = controller;
-            this.filename = filename;
+
             InitializeComponent();
             Icon = Icon.FromHandle(Resources.ssw128.GetHicon());
 
+            var nLogConfig = NLogConfig.LoadXML();
+            try
+            {
+                this.filename = nLogConfig.GetLogFileName();
+            }
+            catch(Exception)
+            {
+                // failed to get the file name
+            }
+            if (string.IsNullOrEmpty(this.filename))
+            {
+                LogMessageTextBox.AppendText("Cannot get the log file name from NLog config file. Please check if the nlog config file exists with corresponding XML nodes.");
+            }
+
             LogViewerConfig config = controller.GetConfigurationCopy().logViewer;
 
             topMostTrigger = config.topMost;
@@ -158,6 +175,8 @@ namespace Shadowsocks.View
 
         private void InitContent()
         {
+            if (string.IsNullOrEmpty(filename) || !File.Exists(filename))
+                return;
             using (StreamReader reader = new StreamReader(new FileStream(filename,
                      FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
             {
@@ -170,7 +189,7 @@ namespace Shadowsocks.View
                 string line = "";
                 StringBuilder appendText = new StringBuilder(1024);
                 while ((line = reader.ReadLine()) != null)
-                    appendText.Append(line + Environment.NewLine);
+                    appendText.AppendLine(line);
 
                 LogMessageTextBox.AppendText(appendText.ToString());
                 LogMessageTextBox.ScrollToCaret();
@@ -181,6 +200,11 @@ namespace Shadowsocks.View
 
         private void UpdateContent()
         {
+            this.Text = I18N.GetString("Log Viewer") +
+                        $" [in: {Utils.FormatBytes(controller.InboundCounter)}, out: {Utils.FormatBytes(controller.OutboundCounter)}]";
+
+            if (string.IsNullOrEmpty(filename) || !File.Exists(filename))
+                return;
             try
             {
                 using (StreamReader reader = new StreamReader(new FileStream(filename,
@@ -194,7 +218,7 @@ namespace Shadowsocks.View
                     while ((line = reader.ReadLine()) != null)
                     {
                         changed = true;
-                        appendText.Append(line + Environment.NewLine);
+                        appendText.AppendLine(line);
                     }
 
                     if (changed)
@@ -209,9 +233,6 @@ namespace Shadowsocks.View
             catch (FileNotFoundException)
             {
             }
-
-            this.Text = I18N.GetString("Log Viewer") +
-                $" [in: {Utils.FormatBytes(controller.InboundCounter)}, out: {Utils.FormatBytes(controller.OutboundCounter)}]";
         }
 
         private void LogForm_Load(object sender, EventArgs e)
@@ -270,7 +291,7 @@ namespace Shadowsocks.View
         private void OpenLocationMenuItem_Click(object sender, EventArgs e)
         {
             string argument = "/select, \"" + filename + "\"";
-            Logging.Debug(argument);
+            logger.Debug(argument);
             System.Diagnostics.Process.Start("explorer.exe", argument);
         }
 
@@ -287,7 +308,11 @@ namespace Shadowsocks.View
         #region Clean up the content in LogMessageTextBox.
         private void DoClearLogs()
         {
-            Logging.Clear();
+            try
+            {
+                File.Delete(filename);
+            }
+            catch { }
             lastOffset = 0;
             LogMessageTextBox.Clear();
         }
@@ -317,7 +342,7 @@ namespace Shadowsocks.View
             }
             catch (Exception ex)
             {
-                Logging.LogUsefulException(ex);
+                logger.LogUsefulException(ex);
                 MessageBox.Show(ex.Message);
             }
         }
diff --git a/shadowsocks-csharp/View/MenuViewController.cs b/shadowsocks-csharp/View/MenuViewController.cs
index 59abf18b..ddcf21f4 100644
--- a/shadowsocks-csharp/View/MenuViewController.cs
+++ b/shadowsocks-csharp/View/MenuViewController.cs
@@ -1,4 +1,5 @@
-using Shadowsocks.Controller;
+using NLog;
+using Shadowsocks.Controller;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
@@ -17,6 +18,7 @@ namespace Shadowsocks.View
 {
     public class MenuViewController
     {
+        private static Logger logger = LogManager.GetCurrentClassLogger();
         // yes this is just a menu view controller
         // when config form is closed, it moves away from RAM
         // and it should just do anything related to the config form
@@ -220,7 +222,7 @@ namespace Shadowsocks.View
         {
             Color colorMask = Color.White;
 
-            Utils.WindowsThemeMode currentWindowsThemeMode = Utils.GetWindows10SystemThemeSetting(controller.GetCurrentConfiguration().isVerboseLogging);
+            Utils.WindowsThemeMode currentWindowsThemeMode = Utils.GetWindows10SystemThemeSetting();
 
             if (isProxyEnabled)
             {
@@ -386,7 +388,7 @@ namespace Shadowsocks.View
         void controller_UpdatePACFromGFWListError(object sender, System.IO.ErrorEventArgs e)
         {
             ShowBalloonTip(I18N.GetString("Failed to update PAC file"), e.GetException().Message, ToolTipIcon.Error, 5000);
-            Logging.LogUsefulException(e.GetException());
+            logger.LogUsefulException(e.GetException());
         }
 
         void controller_UpdatePACFromGFWListCompleted(object sender, GFWListUpdater.ResultEventArgs e)
@@ -454,30 +456,30 @@ namespace Shadowsocks.View
             {
                 items.RemoveAt(0);
             }
-            int i = 0;
+            int strategyCount = 0;
             foreach (var strategy in controller.GetStrategies())
             {
                 MenuItem item = new MenuItem(strategy.Name);
                 item.Tag = strategy.ID;
                 item.Click += AStrategyItem_Click;
-                items.Add(i, item);
-                i++;
+                items.Add(strategyCount, item);
+                strategyCount++;
             }
 
             // user wants a seperator item between strategy and servers menugroup
-            items.Add(i++, new MenuItem("-"));
+            items.Add(strategyCount++, new MenuItem("-"));
 
-            int strategyCount = i;
+            int serverCount = 0;
             Configuration configuration = controller.GetConfigurationCopy();
             foreach (var server in configuration.configs)
             {
                 if (Configuration.ChecksServer(server))
                 {
                     MenuItem item = new MenuItem(server.FriendlyName());
-                    item.Tag = i - strategyCount;
+                    item.Tag = configuration.configs.FindIndex(s => s == server);
                     item.Click += AServerItem_Click;
-                    items.Add(i, item);
-                    i++;
+                    items.Add(strategyCount + serverCount, item);
+                    serverCount++;
                 }
             }
 
@@ -543,7 +545,7 @@ namespace Shadowsocks.View
             }
             else
             {
-                logForm = new LogForm(controller, Logging.LogFilePath);
+                logForm = new LogForm(controller);
                 logForm.Show();
                 logForm.Activate();
                 logForm.FormClosed += logForm_FormClosed;
diff --git a/shadowsocks-csharp/packages.config b/shadowsocks-csharp/packages.config
index f7fcb451..911e1d9a 100644
--- a/shadowsocks-csharp/packages.config
+++ b/shadowsocks-csharp/packages.config
@@ -5,6 +5,7 @@
   <package id="Fody" version="4.2.1" targetFramework="net472" developmentDependency="true" />
   <package id="GlobalHotKey" version="1.1.0" targetFramework="net472" />
   <package id="Newtonsoft.Json" version="12.0.2" targetFramework="net472" />
+  <package id="NLog" version="4.6.8" targetFramework="net472" />
   <package id="StringEx.CS" version="0.3.1" targetFramework="net472" developmentDependency="true" />
   <package id="ZXing.Net" version="0.16.5" targetFramework="net472" />
 </packages>
\ No newline at end of file
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index dd59f561..bf562337 100644
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -82,12 +82,21 @@
     <Reference Include="Newtonsoft.Json, Version=12.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>..\packages\Newtonsoft.Json.12.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
+      <HintPath>..\packages\NLog.4.6.8\lib\net45\NLog.dll</HintPath>
+    </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="System" />
+    <Reference Include="System.Configuration" />
     <Reference Include="System.Data" />
+    <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="System.Drawing" />
+    <Reference Include="System.IO.Compression" />
     <Reference Include="System.Management" />
     <Reference Include="System.Net" />
+    <Reference Include="System.Runtime.Serialization" />
+    <Reference Include="System.ServiceModel" />
+    <Reference Include="System.Transactions" />
     <Reference Include="System.Web" />
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Windows.Forms.DataVisualization" />
@@ -102,6 +111,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Controller\HotkeyReg.cs" />
+    <Compile Include="Controller\LoggerExtension.cs" />
     <Compile Include="Controller\Service\PACDaemon.cs" />
     <Compile Include="Controller\System\Hotkeys\HotkeyCallbacks.cs" />
     <Compile Include="Encryption\AEAD\AEADEncryptor.cs" />
@@ -122,6 +132,7 @@
     <Compile Include="Encryption\Stream\StreamOpenSSLEncryptor.cs" />
     <Compile Include="Encryption\Stream\StreamSodiumEncryptor.cs" />
     <Compile Include="Model\HotKeyConfig.cs" />
+    <Compile Include="Model\NLogConfig.cs" />
     <Compile Include="Model\ProxyConfig.cs" />
     <Compile Include="Model\SysproxyConfig.cs" />
     <Compile Include="Properties\Resources.Designer.cs">
@@ -145,7 +156,6 @@
     <Compile Include="Controller\Service\GFWListUpdater.cs" />
     <Compile Include="Controller\I18N.cs" />
     <Compile Include="Controller\Service\Listener.cs" />
-    <Compile Include="Controller\Logging.cs" />
     <Compile Include="Controller\Service\PortForwarder.cs" />
     <Compile Include="Controller\Service\UDPRelay.cs" />
     <Compile Include="Controller\Service\UpdateChecker.cs" />
@@ -257,6 +267,7 @@
     </None>
     <None Include="Data\i18n.csv" />
     <None Include="Data\libsscrypto.dll.gz" />
+    <None Include="Data\NLog.config" />
     <None Include="Data\privoxy.exe.gz" />
   </ItemGroup>
   <ItemGroup>
diff --git a/shadowsocks-windows.sln b/shadowsocks-windows.sln
index 1c24be82..d0048437 100644
--- a/shadowsocks-windows.sln
+++ b/shadowsocks-windows.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26228.10
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29709.97
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "shadowsocks-csharp", "shadowsocks-csharp\shadowsocks-csharp.csproj", "{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}"
 EndProject
@@ -12,21 +12,30 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ShadowsocksTest", "test\Sha
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
 		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Debug|Any CPU.ActiveCfg = Debug|x86
 		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Debug|x86.ActiveCfg = Debug|x86
 		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Debug|x86.Build.0 = Debug|x86
 		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Debug|x86.Deploy.0 = Debug|x86
+		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Release|Any CPU.ActiveCfg = Release|x86
 		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Release|x86.ActiveCfg = Release|x86
 		{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}.Release|x86.Build.0 = Release|x86
+		{45913187-0685-4903-B250-DCEF0479CD86}.Debug|Any CPU.ActiveCfg = Debug|x86
 		{45913187-0685-4903-B250-DCEF0479CD86}.Debug|x86.ActiveCfg = Debug|x86
 		{45913187-0685-4903-B250-DCEF0479CD86}.Debug|x86.Build.0 = Debug|x86
+		{45913187-0685-4903-B250-DCEF0479CD86}.Release|Any CPU.ActiveCfg = Release|x86
 		{45913187-0685-4903-B250-DCEF0479CD86}.Release|x86.ActiveCfg = Release|x86
 		{45913187-0685-4903-B250-DCEF0479CD86}.Release|x86.Build.0 = Release|x86
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {F7E7D35B-4FDA-4385-95CF-09DADED042EA}
+	EndGlobalSection
 EndGlobal