diff --git a/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs b/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs
index d3123e51..b3f00f5b 100644
--- a/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs
+++ b/shadowsocks-csharp/Controller/Service/GfwListUpdater.cs
@@ -1,127 +1,129 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Net;
-using System.Text;
-
-using Newtonsoft.Json;
-
-using Shadowsocks.Model;
-using Shadowsocks.Properties;
-using Shadowsocks.Util;
-
-namespace Shadowsocks.Controller
-{
-    public class GFWListUpdater
-    {
-        private const string GFWLIST_URL = "https://raw.githubusercontent.com/gfwlist/gfwlist/master/gfwlist.txt";
-
-        public event EventHandler<ResultEventArgs> UpdateCompleted;
-
-        public event ErrorEventHandler Error;
-
-        public class ResultEventArgs : EventArgs
-        {
-            public bool Success;
-
-            public ResultEventArgs(bool success)
-            {
-                this.Success = success;
-            }
-        }
-
-        private static readonly IEnumerable<char> IgnoredLineBegins = new[] { '!', '[' };
-        private void http_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
-        {
-            try
-            {
-                File.WriteAllText(Utils.GetTempPath("gfwlist.txt"), e.Result, Encoding.UTF8);
-                bool pacFileChanged = MergeAndWritePACFile(e.Result);
-                UpdateCompleted?.Invoke(this, new ResultEventArgs(pacFileChanged));
-            }
-            catch (Exception ex)
-            {
-                Error?.Invoke(this, new ErrorEventArgs(ex));
-            }
-        }
-
-        public static bool MergeAndWritePACFile(string gfwListResult)
-        {
-            string abpContent = MergePACFile(gfwListResult);
-            if (File.Exists(PACDaemon.PAC_FILE))
-            {
-                string original = FileManager.NonExclusiveReadAllText(PACDaemon.PAC_FILE, Encoding.UTF8);
-                if (original == abpContent)
-                {
-                    return false;
-                }
-            }
-            File.WriteAllText(PACDaemon.PAC_FILE, abpContent, Encoding.UTF8);
-            return true;
-        }
-
-        private static string MergePACFile(string gfwListResult)
-        {
-            string abpContent;
-            if (File.Exists(PACDaemon.USER_ABP_FILE))
-            {
-                abpContent = FileManager.NonExclusiveReadAllText(PACDaemon.USER_ABP_FILE, Encoding.UTF8);
-            }
-            else
-            {
-                abpContent = Resources.abp_js;
-            }
-
-            List<string> userruleLines = new List<string>();
-            if (File.Exists(PACDaemon.USER_RULE_FILE))
-            {
-                string userrulesString = FileManager.NonExclusiveReadAllText(PACDaemon.USER_RULE_FILE, Encoding.UTF8);
-                userruleLines = ParseToValidList(userrulesString);
-            }
-
-            List<string> gfwLines = new List<string>();
-            gfwLines = ParseBase64ToValidList(gfwListResult);
-            abpContent =
-$@"var __USERRULES__ = {JsonConvert.SerializeObject(userruleLines, Formatting.Indented)};
-var __RULES__ = {JsonConvert.SerializeObject(gfwLines, Formatting.Indented)};
-{abpContent}";
-            return abpContent;
-        }
-
-        public void UpdatePACFromGFWList(Configuration config)
-        {
-            Logging.Info($"Checking GFWList from {GFWLIST_URL}");
-            WebClient http = new WebClient();
-            if (config.enabled)
-            {
-                http.Proxy = new WebProxy(
-                    config.isIPv6Enabled ? IPAddress.IPv6Loopback.ToString() : IPAddress.Loopback.ToString(),
-                    config.localPort);
-            }
-            http.DownloadStringCompleted += http_DownloadStringCompleted;
-            http.DownloadStringAsync(new Uri(GFWLIST_URL));
-        }
-
-        public static List<string> ParseBase64ToValidList(string response)
-        {
-            byte[] bytes = Convert.FromBase64String(response);
-            string content = Encoding.ASCII.GetString(bytes);
-            return ParseToValidList(content);
-        }
-
-        private static List<string> ParseToValidList(string content)
-        {
-            List<string> valid_lines = new List<string>();
-            using (var sr = new StringReader(content))
-            {
-                foreach (var line in sr.NonWhiteSpaceLines())
-                {
-                    if (line.BeginWithAny(IgnoredLineBegins))
-                        continue;
-                    valid_lines.Add(line);
-                }
-            }
-            return valid_lines;
-        }
-    }
-}
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Text;
+
+using Newtonsoft.Json;
+
+using Shadowsocks.Model;
+using Shadowsocks.Properties;
+using Shadowsocks.Util;
+
+namespace Shadowsocks.Controller
+{
+    public class GFWListUpdater
+    {
+        private const string GFWLIST_URL = "https://raw.githubusercontent.com/gfwlist/gfwlist/master/gfwlist.txt";
+
+        public event EventHandler<ResultEventArgs> UpdateCompleted;
+
+        public event ErrorEventHandler Error;
+
+        public class ResultEventArgs : EventArgs
+        {
+            public bool Success;
+
+            public ResultEventArgs(bool success)
+            {
+                this.Success = success;
+            }
+        }
+
+        private static readonly IEnumerable<char> IgnoredLineBegins = new[] { '!', '[' };
+        private void http_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
+        {
+            try
+            {
+                File.WriteAllText(Utils.GetTempPath("gfwlist.txt"), e.Result, Encoding.UTF8);
+                bool pacFileChanged = MergeAndWritePACFile(e.Result);
+                UpdateCompleted?.Invoke(this, new ResultEventArgs(pacFileChanged));
+            }
+            catch (Exception ex)
+            {
+                Error?.Invoke(this, new ErrorEventArgs(ex));
+            }
+        }
+
+        public static bool MergeAndWritePACFile(string gfwListResult)
+        {
+            string abpContent = MergePACFile(gfwListResult);
+            if (File.Exists(PACDaemon.PAC_FILE))
+            {
+                string original = FileManager.NonExclusiveReadAllText(PACDaemon.PAC_FILE, Encoding.UTF8);
+                if (original == abpContent)
+                {
+                    return false;
+                }
+            }
+            File.WriteAllText(PACDaemon.PAC_FILE, abpContent, Encoding.UTF8);
+            return true;
+        }
+
+        private static string MergePACFile(string gfwListResult)
+        {
+            string abpContent;
+            if (File.Exists(PACDaemon.USER_ABP_FILE))
+            {
+                abpContent = FileManager.NonExclusiveReadAllText(PACDaemon.USER_ABP_FILE, Encoding.UTF8);
+            }
+            else
+            {
+                abpContent = Resources.abp_js;
+            }
+
+            List<string> userruleLines = new List<string>();
+            if (File.Exists(PACDaemon.USER_RULE_FILE))
+            {
+                string userrulesString = FileManager.NonExclusiveReadAllText(PACDaemon.USER_RULE_FILE, Encoding.UTF8);
+                userruleLines = ParseToValidList(userrulesString);
+            }
+
+            List<string> gfwLines = new List<string>();
+            gfwLines = ParseBase64ToValidList(gfwListResult);
+            abpContent =
+$@"var __USERRULES__ = {JsonConvert.SerializeObject(userruleLines, Formatting.Indented)};
+var __RULES__ = {JsonConvert.SerializeObject(gfwLines, Formatting.Indented)};
+{abpContent}";
+            return abpContent;
+        }
+
+        public void UpdatePACFromGFWList(Configuration config)
+        {
+            Logging.Info($"Checking GFWList from {GFWLIST_URL}");
+            WebClient http = new WebClient();
+            if (config.enabled)
+            {
+                http.Proxy = new WebProxy(
+                    config.isIPv6Enabled
+                    ? $"[{IPAddress.IPv6Loopback.ToString()}]"
+                    : IPAddress.Loopback.ToString(),
+                    config.localPort);
+            }
+            http.DownloadStringCompleted += http_DownloadStringCompleted;
+            http.DownloadStringAsync(new Uri(GFWLIST_URL));
+        }
+
+        public static List<string> ParseBase64ToValidList(string response)
+        {
+            byte[] bytes = Convert.FromBase64String(response);
+            string content = Encoding.ASCII.GetString(bytes);
+            return ParseToValidList(content);
+        }
+
+        private static List<string> ParseToValidList(string content)
+        {
+            List<string> valid_lines = new List<string>();
+            using (var sr = new StringReader(content))
+            {
+                foreach (var line in sr.NonWhiteSpaceLines())
+                {
+                    if (line.BeginWithAny(IgnoredLineBegins))
+                        continue;
+                    valid_lines.Add(line);
+                }
+            }
+            return valid_lines;
+        }
+    }
+}