diff --git a/shadowsocks-csharp/Encrypt/EncryptorFactory.cs b/shadowsocks-csharp/Encrypt/EncryptorFactory.cs
index dbb45d33..59111a69 100644
--- a/shadowsocks-csharp/Encrypt/EncryptorFactory.cs
+++ b/shadowsocks-csharp/Encrypt/EncryptorFactory.cs
@@ -10,7 +10,7 @@ namespace Shadowsocks.Encrypt
                 return new TableEncryptor(method, password);
             }
 
-            return new OpenSSLEncryptor(method, password);
+            return new PolarSSLEncryptor(method, password);
         }
     }
 }
diff --git a/shadowsocks-csharp/Encrypt/PolarSSL.cs b/shadowsocks-csharp/Encrypt/PolarSSL.cs
index 0eab93c7..1ce44439 100755
--- a/shadowsocks-csharp/Encrypt/PolarSSL.cs
+++ b/shadowsocks-csharp/Encrypt/PolarSSL.cs
@@ -7,7 +7,7 @@ namespace Shadowsocks.Encrypt
 {
     public class PolarSSL
     {
-        const string DLLNAME = "polarssl";
+        const string DLLNAME = "libpolarssl";
 
         public const int AES_CTX_SIZE = 8 + 4 * 68;
         public const int AES_ENCRYPT = 1;
diff --git a/shadowsocks-csharp/Program.cs b/shadowsocks-csharp/Program.cs
index d730419a..df44a09e 100755
--- a/shadowsocks-csharp/Program.cs
+++ b/shadowsocks-csharp/Program.cs
@@ -45,7 +45,7 @@ namespace Shadowsocks
                 {
                     Console.WriteLine(e.ToString());
                 }
-                LoadLibrary(dllPath);
+                //LoadLibrary(dllPath);
 
 #if !DEBUG
                 Logging.OpenLogFile();
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index 7629f4fc..d081645c 100755
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>Shadowsocks</RootNamespace>
     <AssemblyName>Shadowsocks</AssemblyName>
-    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <StartupObject>
     </StartupObject>
@@ -21,8 +21,7 @@
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
     <OldToolsVersion>3.5</OldToolsVersion>
-    <TargetFrameworkProfile>
-    </TargetFrameworkProfile>
+    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
     <PublishUrl>publish\</PublishUrl>
     <Install>true</Install>
     <InstallFrom>Disk</InstallFrom>