diff --git a/shadowsocks-csharp/Config.cs b/shadowsocks-csharp/Config.cs
index 41afe134..b981e782 100755
--- a/shadowsocks-csharp/Config.cs
+++ b/shadowsocks-csharp/Config.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Runtime.Serialization.Json;
 using System.Text;
 using System.IO;
+using System.Diagnostics;
 
 namespace shadowsocks_csharp
 {
@@ -14,6 +15,17 @@ namespace shadowsocks_csharp
         public int local_port;
         public string password;
 
+        [NonSerialized]
+        public bool isDefault;
+
+        private static void assert(bool condition)
+        {
+            if(!condition) 
+            {
+                throw new Exception("assertion failure");
+            }
+        }
+
         public static Config Load()
         {
             DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Config));
@@ -22,17 +34,24 @@ namespace shadowsocks_csharp
                 using (FileStream fs = File.OpenRead(@"config.json"))
                 {
                     Config config = ser.ReadObject(fs) as Config;
+                    assert(!string.IsNullOrEmpty(config.server));
+                    assert(!string.IsNullOrEmpty(config.password));
+                    assert(config.local_port > 0);
+                    assert(config.server_port > 0);
+                    config.isDefault = false;
                     return config;
                 }
             }
-            catch (IOException)
+            catch (Exception e)
             {
+                Console.WriteLine(e);
                 return new Config
                 {
                     server = "127.0.0.1",
                     server_port = 8388,
                     local_port = 1081,
-                    password = "barfoo!"
+                    password = "barfoo!",
+                    isDefault = true
                 };
             }
         }
diff --git a/shadowsocks-csharp/Form1.Designer.cs b/shadowsocks-csharp/Form1.Designer.cs
index 31b165e1..7cca0a29 100755
--- a/shadowsocks-csharp/Form1.Designer.cs
+++ b/shadowsocks-csharp/Form1.Designer.cs
@@ -45,7 +45,9 @@
             this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components);
             this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
             this.ConfigItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.aboutToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.QuitItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator();
             this.tableLayoutPanel1.SuspendLayout();
             this.panel1.SuspendLayout();
             this.contextMenuStrip1.SuspendLayout();
@@ -175,7 +177,7 @@
             this.button2.TabIndex = 1;
             this.button2.Text = "Cancel";
             this.button2.UseVisualStyleBackColor = true;
-            this.button2.Click += new System.EventHandler(this.button2_Click);
+            this.button2.Click += new System.EventHandler(this.cancelButton_Click);
             // 
             // button1
             // 
@@ -186,39 +188,54 @@
             this.button1.TabIndex = 0;
             this.button1.Text = "OK";
             this.button1.UseVisualStyleBackColor = true;
-            this.button1.Click += new System.EventHandler(this.button1_Click);
+            this.button1.Click += new System.EventHandler(this.OKButton_Click);
             // 
             // notifyIcon1
             // 
             this.notifyIcon1.ContextMenuStrip = this.contextMenuStrip1;
             this.notifyIcon1.Icon = ((System.Drawing.Icon)(resources.GetObject("notifyIcon1.Icon")));
-            this.notifyIcon1.Text = "notifyIcon1";
+            this.notifyIcon1.Text = "shadowsocks";
             this.notifyIcon1.Visible = true;
+            this.notifyIcon1.DoubleClick += new System.EventHandler(this.notifyIcon1_DoubleClick);
             // 
             // contextMenuStrip1
             // 
             this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
             this.ConfigItem,
+            this.aboutToolStripMenuItem,
+            this.toolStripSeparator2,
             this.QuitItem});
             this.contextMenuStrip1.Name = "contextMenuStrip1";
             this.contextMenuStrip1.RenderMode = System.Windows.Forms.ToolStripRenderMode.System;
-            this.contextMenuStrip1.ShowImageMargin = false;
-            this.contextMenuStrip1.Size = new System.Drawing.Size(86, 48);
+            this.contextMenuStrip1.Size = new System.Drawing.Size(111, 76);
             // 
             // ConfigItem
             // 
+            this.ConfigItem.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Bold);
             this.ConfigItem.Name = "ConfigItem";
-            this.ConfigItem.Size = new System.Drawing.Size(85, 22);
+            this.ConfigItem.Size = new System.Drawing.Size(110, 22);
             this.ConfigItem.Text = "Config";
             this.ConfigItem.Click += new System.EventHandler(this.Config_Click);
             // 
+            // aboutToolStripMenuItem
+            // 
+            this.aboutToolStripMenuItem.Name = "aboutToolStripMenuItem";
+            this.aboutToolStripMenuItem.Size = new System.Drawing.Size(110, 22);
+            this.aboutToolStripMenuItem.Text = "About";
+            this.aboutToolStripMenuItem.Click += new System.EventHandler(this.aboutToolStripMenuItem_Click);
+            // 
             // QuitItem
             // 
             this.QuitItem.Name = "QuitItem";
-            this.QuitItem.Size = new System.Drawing.Size(85, 22);
+            this.QuitItem.Size = new System.Drawing.Size(110, 22);
             this.QuitItem.Text = "Quit";
             this.QuitItem.Click += new System.EventHandler(this.Quit_Click);
             // 
+            // toolStripSeparator2
+            // 
+            this.toolStripSeparator2.Name = "toolStripSeparator2";
+            this.toolStripSeparator2.Size = new System.Drawing.Size(107, 6);
+            // 
             // Form1
             // 
             this.AcceptButton = this.button1;
@@ -233,6 +250,7 @@
             this.Name = "Form1";
             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
             this.Text = "Shadowsocks";
+            this.Load += new System.EventHandler(this.Form1_Load);
             this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form1_FormClosed);
             this.tableLayoutPanel1.ResumeLayout(false);
             this.tableLayoutPanel1.PerformLayout();
@@ -261,6 +279,8 @@
         private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
         private System.Windows.Forms.ToolStripMenuItem ConfigItem;
         private System.Windows.Forms.ToolStripMenuItem QuitItem;
+        private System.Windows.Forms.ToolStripMenuItem aboutToolStripMenuItem;
+        private System.Windows.Forms.ToolStripSeparator toolStripSeparator2;
     }
 }
 
diff --git a/shadowsocks-csharp/Form1.cs b/shadowsocks-csharp/Form1.cs
index 587d0411..b6a8d8d8 100755
--- a/shadowsocks-csharp/Form1.cs
+++ b/shadowsocks-csharp/Form1.cs
@@ -5,6 +5,7 @@ using System.Data;
 using System.Drawing;
 using System.Text;
 using System.Windows.Forms;
+using System.Diagnostics;
 
 namespace shadowsocks_csharp
 {
@@ -16,14 +17,36 @@ namespace shadowsocks_csharp
         public Form1()
         {
             config = Config.Load();
-            reload(config);
             InitializeComponent();
+            configToTextBox();
+        }
+
+        private void showWindow()
+        {
+            this.Opacity = 1;
+            this.Show();
+        }
+
+        private void configToTextBox()
+        {
             textBox1.Text = config.server;
             textBox2.Text = config.server_port.ToString();
             textBox3.Text = config.password;
             textBox4.Text = config.local_port.ToString();
         }
 
+        private void Form1_Load(object sender, EventArgs e)
+        {
+            if (!config.isDefault)
+            {
+                this.Opacity = 0;
+                reload(config); BeginInvoke(new MethodInvoker(delegate
+                {
+                    this.Hide();
+                }));
+            }
+        }
+
         private void reload(Config config)
         {
             if (local != null)
@@ -37,22 +60,45 @@ namespace shadowsocks_csharp
 
         private void Config_Click(object sender, EventArgs e)
         {
-
+            showWindow();
         }
 
         private void Quit_Click(object sender, EventArgs e)
         {
-
+            this.Close();
         }
 
-        private void button1_Click(object sender, EventArgs e)
+        private void OKButton_Click(object sender, EventArgs e)
         {
-            reload(Config.Load());
+            try
+            {
+                Config config = new Config
+                {
+                    server = textBox1.Text,
+                    server_port = int.Parse(textBox2.Text),
+                    password = textBox3.Text,
+                    local_port = int.Parse(textBox4.Text),
+                    isDefault = false
+                };
+                Config.Save(config);
+                this.config = config;
+                reload(config);
+                this.Hide();
+            }
+            catch (FormatException)
+            {
+                MessageBox.Show("there is format problem");
+            }
+            catch (Exception)
+            {
+                MessageBox.Show("there is some problem with parameters");
+            }
         }
 
-        private void button2_Click(object sender, EventArgs e)
+        private void cancelButton_Click(object sender, EventArgs e)
         {
-
+            this.Hide();
+            configToTextBox();
         }
 
         private void Form1_FormClosed(object sender, FormClosedEventArgs e)
@@ -60,5 +106,15 @@ namespace shadowsocks_csharp
             local.Stop();
         }
 
+        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            Process.Start("https://github.com/clowwindy/shadowsocks-csharp");
+        }
+
+        private void notifyIcon1_DoubleClick(object sender, EventArgs e)
+        {
+            showWindow();
+        }
+
     }
 }
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index 349a69cb..51c38f8b 100755
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{8C02D2F7-7CDB-4D55-9F25-CD03EF4AA062}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>WinExe</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>shadowsocks_csharp</RootNamespace>
     <AssemblyName>shadowsocks-csharp</AssemblyName>