diff --git a/shadowsocks-csharp/3rd/zxing/qrcode/encoder/Encoder.cs b/shadowsocks-csharp/3rd/zxing/qrcode/encoder/Encoder.cs
index 0af5537f..dbae7bf3 100755
--- a/shadowsocks-csharp/3rd/zxing/qrcode/encoder/Encoder.cs
+++ b/shadowsocks-csharp/3rd/zxing/qrcode/encoder/Encoder.cs
@@ -86,7 +86,7 @@ namespace ZXing.QrCode.Internal
          {
             encoding = DEFAULT_BYTE_MODE_ENCODING;
          }
-         bool generateECI = !DEFAULT_BYTE_MODE_ENCODING.Equals(encoding);
+         bool generateECI = !DEFAULT_BYTE_MODE_ENCODING.Equals(encoding, StringComparison.OrdinalIgnoreCase);
 #else
          // Silverlight supports only UTF-8 and UTF-16 out-of-the-box
          const string encoding = "UTF-8";
diff --git a/shadowsocks-csharp/Controller/I18N.cs b/shadowsocks-csharp/Controller/I18N.cs
index c99d0f14..af49e36c 100755
--- a/shadowsocks-csharp/Controller/I18N.cs
+++ b/shadowsocks-csharp/Controller/I18N.cs
@@ -1,11 +1,12 @@
-using Shadowsocks.Properties;
-using System;
+using System;
 using System.Collections.Generic;
-using System.Text;
-using System.Text.RegularExpressions;
+using System.Globalization;
+using System.IO;
 
 namespace Shadowsocks.Controller
 {
+    using Shadowsocks.Properties;
+
     public class I18N
     {
         protected static Dictionary<string, string> Strings;
@@ -13,19 +14,20 @@ namespace Shadowsocks.Controller
         {
             Strings = new Dictionary<string, string>();
 
-            if (System.Globalization.CultureInfo.CurrentCulture.IetfLanguageTag.ToLowerInvariant().StartsWith("zh"))
+            if (CultureInfo.CurrentCulture.IetfLanguageTag.StartsWith("zh", StringComparison.OrdinalIgnoreCase))
             {
-                string[] lines = Regex.Split(Resources.cn, "\r\n|\r|\n");
-                foreach (string line in lines)
+                using (var sr = new StringReader(Resources.cn))
                 {
-                    if (line.StartsWith("#"))
-                    {
-                        continue;
-                    }
-                    string[] kv = Regex.Split(line, "=");
-                    if (kv.Length == 2)
+                    string line;
+                    while ((line = sr.ReadLine()) != null)
                     {
-                        Strings[kv[0]] = kv[1];
+                        if (line[0] == '#')
+                            continue;
+
+                        var pos = line.IndexOf('=');
+                        if (pos < 1)
+                            continue;
+                        Strings[line.Substring(0, pos)] = line.Substring(pos + 1);
                     }
                 }
             }
diff --git a/shadowsocks-csharp/Controller/System/AutoStartup.cs b/shadowsocks-csharp/Controller/System/AutoStartup.cs
index 06180bdb..353056eb 100644
--- a/shadowsocks-csharp/Controller/System/AutoStartup.cs
+++ b/shadowsocks-csharp/Controller/System/AutoStartup.cs
@@ -51,12 +51,12 @@ namespace Shadowsocks.Controller
                 string[] runList = runKey.GetValueNames();
                 foreach (string item in runList)
                 {
-                    if (item == Key)
+                    if (item.Equals(Key, StringComparison.OrdinalIgnoreCase))
                         return true;
-                    else if (item == "Shadowsocks") // Compatibility with older versions
+                    else if (item.Equals("Shadowsocks", StringComparison.OrdinalIgnoreCase)) // Compatibility with older versions
                     {
                         string value = Convert.ToString(runKey.GetValue(item));
-                        if (path.Equals(value, StringComparison.InvariantCultureIgnoreCase))
+                        if (path.Equals(value, StringComparison.OrdinalIgnoreCase))
                         {
                             runKey.DeleteValue(item);
                             runKey.SetValue(Key, path);
@@ -76,7 +76,7 @@ namespace Shadowsocks.Controller
                 if (runKey != null)
                 {
                     try { runKey.Close(); }
-                    catch(Exception e)
+                    catch (Exception e)
                     { Logging.LogUsefulException(e); }
                 }
             }
diff --git a/shadowsocks-csharp/Controller/System/SystemProxy.cs b/shadowsocks-csharp/Controller/System/SystemProxy.cs
index 29560ff4..c13c2f10 100644
--- a/shadowsocks-csharp/Controller/System/SystemProxy.cs
+++ b/shadowsocks-csharp/Controller/System/SystemProxy.cs
@@ -102,11 +102,11 @@ namespace Shadowsocks.Controller
                 var connections = registry.GetValueNames();
                 foreach (var each in connections)
                 {
-                    switch (each)
+                    switch (each.ToUpperInvariant())
                     {
-                        case "DefaultConnectionSettings":
-                        case "LAN Connection":
-                        case "SavedLegacySettings":
+                        case "DEFAULTCONNECTIONSETTINGS":
+                        case "LAN CONNECTION":
+                        case "SAVEDLEGACYSETTINGS":
                             continue;
                         default:
                             //set all the connections's proxy as the lan