diff --git a/shadowsocks-csharp/Data/cn.txt b/shadowsocks-csharp/Data/cn.txt
index 43cffdf2..90a2b2c0 100644
--- a/shadowsocks-csharp/Data/cn.txt
+++ b/shadowsocks-csharp/Data/cn.txt
@@ -45,7 +45,7 @@ QRCode=二维码
 Local PAC=使用本地 PAC
 Online PAC=使用在线 PAC
 Update Online PAC URL=更新在线 PAC 网址
-PAC Url=PAC 网址
+Please input PAC Url=请输入 PAC 网址
 
 # Messages
 
diff --git a/shadowsocks-csharp/View/MenuViewController.cs b/shadowsocks-csharp/View/MenuViewController.cs
index f60be124..53284975 100755
--- a/shadowsocks-csharp/View/MenuViewController.cs
+++ b/shadowsocks-csharp/View/MenuViewController.cs
@@ -38,7 +38,6 @@ namespace Shadowsocks.View
         private MenuItem localPACItem;
         private MenuItem onlinePACItem;
         private ConfigForm configForm;
-        private PACUrlForm pacUrlForm;
         private string _urlToOpen;
 
         public MenuViewController(ShadowsocksController controller)
@@ -513,30 +512,17 @@ namespace Shadowsocks.View
             }
         }
 
-        private void showPACUrlForm()
+        private void UpdateOnlinePACURLItem_Click(object sender, EventArgs e)
         {
-            if (pacUrlForm != null)
-            {
-                pacUrlForm.Activate();
-            }
-            else
+            string origPacUrl = controller.GetConfiguration().pacUrl;
+            string pacUrl = Microsoft.VisualBasic.Interaction.InputBox(
+                I18N.GetString("Please input PAC Url"),
+                I18N.GetString("Update Online PAC URL"),
+                origPacUrl, -1, -1);
+            if (!string.IsNullOrEmpty(pacUrl) && pacUrl != origPacUrl)
             {
-                pacUrlForm = new PACUrlForm(controller);
-                pacUrlForm.Show();
-                pacUrlForm.FormClosed += pacUrlForm_FormClosed;
+                controller.SavePACUrl(pacUrl);
             }
         }
-
-        private void pacUrlForm_FormClosed(object sender, FormClosedEventArgs e)
-        {
-            pacUrlForm = null;
-            Util.Utils.ReleaseMemory();
-            ShowFirstTimeBalloon();
-        }
-
-        private void UpdateOnlinePACURLItem_Click(object sender, EventArgs e)
-        {
-            showPACUrlForm();
-        }
     }
 }
diff --git a/shadowsocks-csharp/View/PACUrlForm.Designer.cs b/shadowsocks-csharp/View/PACUrlForm.Designer.cs
deleted file mode 100644
index f2c48632..00000000
--- a/shadowsocks-csharp/View/PACUrlForm.Designer.cs
+++ /dev/null
@@ -1,151 +0,0 @@
-namespace Shadowsocks.View
-{
-    partial class PACUrlForm
-    {
-        /// <summary>
-        /// Required designer variable.
-        /// </summary>
-        private System.ComponentModel.IContainer components = null;
-
-        /// <summary>
-        /// Clean up any resources being used.
-        /// </summary>
-        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing && (components != null))
-            {
-                components.Dispose();
-            }
-            base.Dispose(disposing);
-        }
-
-        #region Windows Form Designer generated code
-
-        /// <summary>
-        /// Required method for Designer support - do not modify
-        /// the contents of this method with the code editor.
-        /// </summary>
-        private void InitializeComponent()
-        {
-            this.PACUrlTextBox = new System.Windows.Forms.TextBox();
-            this.PACUrlLabel = new System.Windows.Forms.Label();
-            this.OkButton = new System.Windows.Forms.Button();
-            this.MyCancelButton = new System.Windows.Forms.Button();
-            this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
-            this.tableLayoutPanel2 = new System.Windows.Forms.TableLayoutPanel();
-            this.tableLayoutPanel1.SuspendLayout();
-            this.tableLayoutPanel2.SuspendLayout();
-            this.SuspendLayout();
-            // 
-            // PACUrlTextBox
-            // 
-            this.PACUrlTextBox.Anchor = System.Windows.Forms.AnchorStyles.Left;
-            this.PACUrlTextBox.Location = new System.Drawing.Point(53, 3);
-            this.PACUrlTextBox.MaxLength = 256;
-            this.PACUrlTextBox.Name = "PACUrlTextBox";
-            this.PACUrlTextBox.Size = new System.Drawing.Size(245, 20);
-            this.PACUrlTextBox.TabIndex = 4;
-            this.PACUrlTextBox.WordWrap = false;
-            // 
-            // PACUrlLabel
-            // 
-            this.PACUrlLabel.Anchor = System.Windows.Forms.AnchorStyles.Left;
-            this.PACUrlLabel.AutoSize = true;
-            this.PACUrlLabel.Location = new System.Drawing.Point(3, 6);
-            this.PACUrlLabel.Margin = new System.Windows.Forms.Padding(3);
-            this.PACUrlLabel.Name = "PACUrlLabel";
-            this.PACUrlLabel.Size = new System.Drawing.Size(44, 13);
-            this.PACUrlLabel.TabIndex = 3;
-            this.PACUrlLabel.Text = "PAC Url";
-            this.PACUrlLabel.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
-            // 
-            // OkButton
-            // 
-            this.OkButton.Location = new System.Drawing.Point(3, 3);
-            this.OkButton.Name = "OkButton";
-            this.OkButton.Size = new System.Drawing.Size(75, 23);
-            this.OkButton.TabIndex = 5;
-            this.OkButton.Text = "OK";
-            this.OkButton.UseVisualStyleBackColor = true;
-            this.OkButton.Click += new System.EventHandler(this.OkButton_Click);
-            // 
-            // MyCancelButton
-            // 
-            this.MyCancelButton.Location = new System.Drawing.Point(84, 3);
-            this.MyCancelButton.Name = "MyCancelButton";
-            this.MyCancelButton.Size = new System.Drawing.Size(75, 23);
-            this.MyCancelButton.TabIndex = 6;
-            this.MyCancelButton.Text = "Cancel";
-            this.MyCancelButton.UseVisualStyleBackColor = true;
-            this.MyCancelButton.Click += new System.EventHandler(this.MyCancelButton_Click);
-            // 
-            // tableLayoutPanel1
-            // 
-            this.tableLayoutPanel1.AutoSize = true;
-            this.tableLayoutPanel1.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
-            this.tableLayoutPanel1.ColumnCount = 2;
-            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
-            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
-            this.tableLayoutPanel1.Controls.Add(this.PACUrlLabel, 0, 0);
-            this.tableLayoutPanel1.Controls.Add(this.PACUrlTextBox, 1, 0);
-            this.tableLayoutPanel1.Controls.Add(this.tableLayoutPanel2, 1, 1);
-            this.tableLayoutPanel1.Location = new System.Drawing.Point(9, 9);
-            this.tableLayoutPanel1.Name = "tableLayoutPanel1";
-            this.tableLayoutPanel1.RowCount = 2;
-            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(301, 61);
-            this.tableLayoutPanel1.TabIndex = 7;
-            // 
-            // tableLayoutPanel2
-            // 
-            this.tableLayoutPanel2.Anchor = System.Windows.Forms.AnchorStyles.Right;
-            this.tableLayoutPanel2.AutoSize = true;
-            this.tableLayoutPanel2.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
-            this.tableLayoutPanel2.ColumnCount = 2;
-            this.tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
-            this.tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
-            this.tableLayoutPanel2.Controls.Add(this.OkButton, 0, 0);
-            this.tableLayoutPanel2.Controls.Add(this.MyCancelButton, 1, 0);
-            this.tableLayoutPanel2.Location = new System.Drawing.Point(136, 29);
-            this.tableLayoutPanel2.Name = "tableLayoutPanel2";
-            this.tableLayoutPanel2.RowCount = 1;
-            this.tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel2.Size = new System.Drawing.Size(162, 29);
-            this.tableLayoutPanel2.TabIndex = 5;
-            // 
-            // PACUrlForm
-            // 
-            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
-            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.AutoSize = true;
-            this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
-            this.ClientSize = new System.Drawing.Size(351, 101);
-            this.Controls.Add(this.tableLayoutPanel1);
-            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
-            this.MaximizeBox = false;
-            this.MinimizeBox = false;
-            this.Name = "PACUrlForm";
-            this.Padding = new System.Windows.Forms.Padding(3);
-            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
-            this.Text = "Update Online PAC URL";
-            this.Load += new System.EventHandler(this.PACUrlForm_Load);
-            this.tableLayoutPanel1.ResumeLayout(false);
-            this.tableLayoutPanel1.PerformLayout();
-            this.tableLayoutPanel2.ResumeLayout(false);
-            this.ResumeLayout(false);
-            this.PerformLayout();
-
-        }
-
-        #endregion
-
-        private System.Windows.Forms.TextBox PACUrlTextBox;
-        private System.Windows.Forms.Label PACUrlLabel;
-        private System.Windows.Forms.Button OkButton;
-        private System.Windows.Forms.Button MyCancelButton;
-        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
-        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel2;
-    }
-}
\ No newline at end of file
diff --git a/shadowsocks-csharp/View/PACUrlForm.cs b/shadowsocks-csharp/View/PACUrlForm.cs
deleted file mode 100644
index b2e93d48..00000000
--- a/shadowsocks-csharp/View/PACUrlForm.cs
+++ /dev/null
@@ -1,69 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
-using System.Drawing;
-using System.Text;
-using System.Windows.Forms;
-using Shadowsocks.Controller;
-using Shadowsocks.Model;
-using Shadowsocks.Properties;
-
-namespace Shadowsocks.View
-{
-    public partial class PACUrlForm : Form
-    {
-        private ShadowsocksController controller;
-        private string orig_pacUrl;
-
-        public PACUrlForm(ShadowsocksController controller)
-        {
-            this.Font = System.Drawing.SystemFonts.MessageBoxFont;
-            InitializeComponent();
-
-            UpdateTexts();
-            this.Icon = Icon.FromHandle(Resources.ssw128.GetHicon());
-
-            this.controller = controller;
-            controller.ConfigChanged += controller_ConfigChanged;
-        }
-
-        private void UpdateTexts()
-        {
-            OkButton.Text = I18N.GetString("OK");
-            MyCancelButton.Text = I18N.GetString("Cancel");
-            PACUrlLabel.Text = I18N.GetString("PAC Url");
-            this.Text = I18N.GetString("Update Online PAC URL");
-        }
-
-        private void controller_ConfigChanged(object sender, EventArgs e)
-        {
-            orig_pacUrl = PACUrlTextBox.Text = controller.GetConfiguration().pacUrl;
-        }
-
-        private void PACUrlForm_Load(object sender, EventArgs e)
-        {
-            PACUrlTextBox.Text = controller.GetConfiguration().pacUrl;
-        }
-
-        private void OkButton_Click(object sender, EventArgs e)
-        {
-            string pacUrl = PACUrlTextBox.Text.Trim();
-            if (string.IsNullOrEmpty(pacUrl))
-            {
-                MessageBox.Show(I18N.GetString("PAC Url can not be blank"));
-                return;
-            }
-            if (pacUrl != this.orig_pacUrl)
-            {
-                controller.SavePACUrl(pacUrl);
-            }
-            this.Close();
-        }
-
-        private void MyCancelButton_Click(object sender, EventArgs e)
-        {
-            this.Close();
-        }
-    }
-}
diff --git a/shadowsocks-csharp/View/PACUrlForm.resx b/shadowsocks-csharp/View/PACUrlForm.resx
deleted file mode 100644
index 7080a7d1..00000000
--- a/shadowsocks-csharp/View/PACUrlForm.resx
+++ /dev/null
@@ -1,120 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<root>
-  <!-- 
-    Microsoft ResX Schema 
-    
-    Version 2.0
-    
-    The primary goals of this format is to allow a simple XML format 
-    that is mostly human readable. The generation and parsing of the 
-    various data types are done through the TypeConverter classes 
-    associated with the data types.
-    
-    Example:
-    
-    ... ado.net/XML headers & schema ...
-    <resheader name="resmimetype">text/microsoft-resx</resheader>
-    <resheader name="version">2.0</resheader>
-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
-        <value>[base64 mime encoded serialized .NET Framework object]</value>
-    </data>
-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
-        <comment>This is a comment</comment>
-    </data>
-                
-    There are any number of "resheader" rows that contain simple 
-    name/value pairs.
-    
-    Each data row contains a name, and value. The row also contains a 
-    type or mimetype. Type corresponds to a .NET class that support 
-    text/value conversion through the TypeConverter architecture. 
-    Classes that don't support this are serialized and stored with the 
-    mimetype set.
-    
-    The mimetype is used for serialized objects, and tells the 
-    ResXResourceReader how to depersist the object. This is currently not 
-    extensible. For a given mimetype the value must be set accordingly:
-    
-    Note - application/x-microsoft.net.object.binary.base64 is the format 
-    that the ResXResourceWriter will generate, however the reader can 
-    read any of the formats listed below.
-    
-    mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with 
-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
-            : and then encoded with base64 encoding.
-    
-    mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with 
-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
-            : and then encoded with base64 encoding.
-
-    mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array 
-            : using a System.ComponentModel.TypeConverter
-            : and then encoded with base64 encoding.
-    -->
-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
-    <xsd:element name="root" msdata:IsDataSet="true">
-      <xsd:complexType>
-        <xsd:choice maxOccurs="unbounded">
-          <xsd:element name="metadata">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" />
-              </xsd:sequence>
-              <xsd:attribute name="name" use="required" type="xsd:string" />
-              <xsd:attribute name="type" type="xsd:string" />
-              <xsd:attribute name="mimetype" type="xsd:string" />
-              <xsd:attribute ref="xml:space" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="assembly">
-            <xsd:complexType>
-              <xsd:attribute name="alias" type="xsd:string" />
-              <xsd:attribute name="name" type="xsd:string" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="data">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
-              <xsd:attribute ref="xml:space" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="resheader">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" />
-            </xsd:complexType>
-          </xsd:element>
-        </xsd:choice>
-      </xsd:complexType>
-    </xsd:element>
-  </xsd:schema>
-  <resheader name="resmimetype">
-    <value>text/microsoft-resx</value>
-  </resheader>
-  <resheader name="version">
-    <value>2.0</value>
-  </resheader>
-  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-</root>
\ No newline at end of file
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index 273b9f52..aa2c9000 100755
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -63,6 +63,7 @@
     <ApplicationManifest>app.manifest</ApplicationManifest>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Microsoft.VisualBasic" />
     <Reference Include="System" />
     <Reference Include="System.Data" />
     <Reference Include="System.Drawing" />
@@ -162,12 +163,6 @@
     <Compile Include="Controller\ShadowsocksController.cs" />
     <Compile Include="Controller\SystemProxy.cs" />
     <Compile Include="View\MenuViewController.cs" />
-    <Compile Include="View\PACUrlForm.cs">
-      <SubType>Form</SubType>
-    </Compile>
-    <Compile Include="View\PACUrlForm.Designer.cs">
-      <DependentUpon>PACUrlForm.cs</DependentUpon>
-    </Compile>
     <Compile Include="View\QRCodeForm.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -186,9 +181,6 @@
       <SubType>Designer</SubType>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>
     </EmbeddedResource>
-    <EmbeddedResource Include="View\PACUrlForm.resx">
-      <DependentUpon>PACUrlForm.cs</DependentUpon>
-    </EmbeddedResource>
     <EmbeddedResource Include="View\QRCodeForm.resx">
       <DependentUpon>QRCodeForm.cs</DependentUpon>
     </EmbeddedResource>