diff --git a/shadowsocks-csharp/Controller/GfwListUpdater.cs b/shadowsocks-csharp/Controller/GfwListUpdater.cs
index 4cf77293..070c2b4e 100644
--- a/shadowsocks-csharp/Controller/GfwListUpdater.cs
+++ b/shadowsocks-csharp/Controller/GfwListUpdater.cs
@@ -1,88 +1,100 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Net;
-using System.IO;
-using Shadowsocks.Properties;
-using SimpleJson;
-using Shadowsocks.Util;
-using Shadowsocks.Model;
-
-namespace Shadowsocks.Controller
-{
-    public class GFWListUpdater
-    {
-        private const string GFWLIST_URL = "https://autoproxy-gfwlist.googlecode.com/svn/trunk/gfwlist.txt";
-
-        private static string PAC_FILE = PACServer.PAC_FILE;
-
-        public event EventHandler<ResultEventArgs> UpdateCompleted;
-
-        public event ErrorEventHandler Error;
-
-        public class ResultEventArgs : EventArgs
-        {
-            public bool Success;
-
-            public ResultEventArgs(bool success)
-            {
-                this.Success = success;
-            }
-        }
-
-        private void http_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
-        {
-            try
-            {
-                List<string> lines = ParseResult(e.Result);
-
-                string abpContent = Utils.UnGzip(Resources.abp_js);
-                abpContent = abpContent.Replace("__RULES__", SimpleJson.SimpleJson.SerializeObject(lines));
-                if (File.Exists(PAC_FILE))
-                {
-                    string original = File.ReadAllText(PAC_FILE, Encoding.UTF8);
-                    if (original == abpContent)
-                    {
-                        UpdateCompleted(this, new ResultEventArgs(false));
-                        return;
-                    }
-                }
-                File.WriteAllText(PAC_FILE, abpContent, Encoding.UTF8);
-                if (UpdateCompleted != null)
-                {
-                    UpdateCompleted(this, new ResultEventArgs(true));
-                }
-            }
-            catch (Exception ex)
-            {
-                if (Error != null)
-                {
-                    Error(this, new ErrorEventArgs(ex));
-                }
-            }
-        }
-
-        public void UpdatePACFromGFWList(Configuration config)
-        {
-            WebClient http = new WebClient();
-            http.Proxy = new WebProxy(IPAddress.Loopback.ToString(), config.localPort);
-            http.DownloadStringCompleted += http_DownloadStringCompleted;
-            http.DownloadStringAsync(new Uri(GFWLIST_URL));
-        }
-
-        public List<string> ParseResult(string response)
-        {
-            byte[] bytes = Convert.FromBase64String(response);
-            string content = Encoding.ASCII.GetString(bytes);
-            string[] lines = content.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
-            List<string> valid_lines = new List<string>(lines.Length);
-            foreach (string line in lines)
-            {
-                if (line.StartsWith("!") || line.StartsWith("["))
-                    continue;
-                valid_lines.Add(line);
-            }
-            return valid_lines;
-        }
-    }
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Net;
+using System.IO;
+using Shadowsocks.Properties;
+using SimpleJson;
+using Shadowsocks.Util;
+using Shadowsocks.Model;
+
+namespace Shadowsocks.Controller
+{
+    public class GFWListUpdater
+    {
+        private const string GFWLIST_URL = "https://autoproxy-gfwlist.googlecode.com/svn/trunk/gfwlist.txt";
+
+        private static string PAC_FILE = PACServer.PAC_FILE;
+
+        private static string USER_RULE_FILE = PACServer.USER_RULE_FILE;
+
+        public event EventHandler<ResultEventArgs> UpdateCompleted;
+
+        public event ErrorEventHandler Error;
+
+        public class ResultEventArgs : EventArgs
+        {
+            public bool Success;
+
+            public ResultEventArgs(bool success)
+            {
+                this.Success = success;
+            }
+        }
+
+        private void http_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
+        {
+            try
+            {
+                List<string> lines = ParseResult(e.Result);
+                if (File.Exists(USER_RULE_FILE))
+                {
+                    string local = File.ReadAllText(USER_RULE_FILE, Encoding.UTF8);
+                    string[] rules = local.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
+                    foreach(string rule in rules)
+                    {
+                        if (rule.StartsWith("!") || rule.StartsWith("["))
+                            continue;
+                        lines.Add(rule);
+                    }
+                }
+                string abpContent = Utils.UnGzip(Resources.abp_js);
+                abpContent = abpContent.Replace("__RULES__", SimpleJson.SimpleJson.SerializeObject(lines));
+                if (File.Exists(PAC_FILE))
+                {
+                    string original = File.ReadAllText(PAC_FILE, Encoding.UTF8);
+                    if (original == abpContent)
+                    {
+                        UpdateCompleted(this, new ResultEventArgs(false));
+                        return;
+                    }
+                }
+                File.WriteAllText(PAC_FILE, abpContent, Encoding.UTF8);
+                if (UpdateCompleted != null)
+                {
+                    UpdateCompleted(this, new ResultEventArgs(true));
+                }
+            }
+            catch (Exception ex)
+            {
+                if (Error != null)
+                {
+                    Error(this, new ErrorEventArgs(ex));
+                }
+            }
+        }
+
+        public void UpdatePACFromGFWList(Configuration config)
+        {
+            WebClient http = new WebClient();
+            http.Proxy = new WebProxy(IPAddress.Loopback.ToString(), config.localPort);
+            http.DownloadStringCompleted += http_DownloadStringCompleted;
+            http.DownloadStringAsync(new Uri(GFWLIST_URL));
+        }
+
+        public List<string> ParseResult(string response)
+        {
+            byte[] bytes = Convert.FromBase64String(response);
+            string content = Encoding.ASCII.GetString(bytes);
+            string[] lines = content.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
+            List<string> valid_lines = new List<string>(lines.Length);
+            foreach (string line in lines)
+            {
+                if (line.StartsWith("!") || line.StartsWith("["))
+                    continue;
+                valid_lines.Add(line);
+            }
+            return valid_lines;
+        }
+    }
 }
\ No newline at end of file
diff --git a/shadowsocks-csharp/Controller/PACServer.cs b/shadowsocks-csharp/Controller/PACServer.cs
index 9d5e345e..934a7855 100755
--- a/shadowsocks-csharp/Controller/PACServer.cs
+++ b/shadowsocks-csharp/Controller/PACServer.cs
@@ -16,6 +16,8 @@ namespace Shadowsocks.Controller
     {
         public static string PAC_FILE = "pac.txt";
 
+        public static string USER_RULE_FILE = "user-rule.txt";
+
         FileSystemWatcher watcher;
         private Configuration _config;