Get rid of WrappedSocket. It's not needed in .NET 4.5+

Author: notsure2

shadowsocks-csharp/Controller/Service/PortForwarder.cs

@@ -32,7 +32,7 @@ private class Handler
             private byte[] _firstPacket;
             private int _firstPacketLength;
             private Socket _local;
-            private WrappedSocket _remote;
+            private Socket _remote;
             private bool _closed = false;
             private bool _localShutdown = false;
             private bool _remoteShutdown = false;
@@ -56,7 +56,7 @@ public void Start(byte[] firstPacket, int length, Socket socket, int targetPort)
                     EndPoint remoteEP = SocketUtil.GetEndPoint(_local.AddressFamily == AddressFamily.InterNetworkV6 ? "[::1]" : "127.0.0.1", targetPort);
 
                     // Connect to the remote endpoint.
-                    _remote = new WrappedSocket();
+                    _remote = new Socket(SocketType.Stream, ProtocolType.Tcp);
                     _remote.BeginConnect(remoteEP, ConnectCallback, null);
                 }
                 catch (Exception e)

shadowsocks-csharp/Proxy/DirectConnect.cs

@@ -34,7 +34,7 @@ public override string ToString()
             }
         }
 
-        private WrappedSocket _remote = new WrappedSocket();
+        private Socket _remote = new Socket(SocketType.Stream, ProtocolType.Tcp);
 
         public EndPoint LocalEndPoint => _remote.LocalEndPoint;
 

shadowsocks-csharp/Proxy/HttpProxy.cs

@@ -49,7 +49,7 @@ private class HttpState
         public EndPoint DestEndPoint { get; private set; }
 
 
-        private readonly WrappedSocket _remote = new WrappedSocket();
+        private readonly Socket _remote = new Socket(SocketType.Stream, ProtocolType.Tcp);
 
 
         public void BeginConnectProxy(EndPoint remoteEP, AsyncCallback callback, object state)

shadowsocks-csharp/Proxy/Socks5Proxy.cs

@@ -5,7 +5,6 @@
 using System.Threading;
 using Shadowsocks.Controller;
 using Shadowsocks.Model;
-using Shadowsocks.Util.Sockets;
 
 namespace Shadowsocks.Proxy
 {
@@ -42,7 +41,7 @@ private class Socks5State
             public Exception ex { get; set; }
         }
 
-        private readonly WrappedSocket _remote = new WrappedSocket();
+        private readonly Socket _remote = new Socket(SocketType.Stream, ProtocolType.Tcp);
 
         private const int Socks5PktMaxSize = 4 + 16 + 2;
         private readonly byte[] _receiveBuffer = new byte[Socks5PktMaxSize];

shadowsocks-csharp/Util/Sockets/LineReader.cs

@@ -1,11 +1,12 @@
 using System;
+using System.Net.Sockets;
 using System.Text;
 
 namespace Shadowsocks.Util.Sockets
 {
     public class LineReader
     {
-        private readonly WrappedSocket _socket;
+        private readonly Socket _socket;
         private readonly Func<string, object, bool> _onLineRead;
         private readonly Action<Exception, object> _onException;
         private readonly Action<byte[], int, int, object> _onFinish;
@@ -20,7 +21,7 @@ public class LineReader
 
         private int _bufferIndex;
 
-        public LineReader(WrappedSocket socket, Func<string, object, bool> onLineRead, Action<Exception, object> onException,
+        public LineReader(Socket socket, Func<string, object, bool> onLineRead, Action<Exception, object> onException,
             Action<byte[], int, int, object> onFinish, Encoding encoding, string delimiter, int maxLineBytes, object state)
         {
             if (socket == null)

shadowsocks-csharp/Util/Sockets/WrappedSocket.cs

@@ -349,7 +349,6 @@
     <Compile Include="Util\ProcessManagement\ThreadUtil.cs" />
     <Compile Include="Util\Sockets\LineReader.cs" />
     <Compile Include="Util\Sockets\SocketUtil.cs" />
-    <Compile Include="Util\Sockets\WrappedSocket.cs" />
     <Compile Include="Util\SystemProxy\ProxyException.cs" />
     <Compile Include="Util\SystemProxy\Sysproxy.cs" />
     <Compile Include="Util\Util.cs" />