public class SocketClientManager
{
public delegate void ConnectStateEventHandler();
public event ConnectStateEventHandler ConnectedEvent;//连接成功
public event ConnectStateEventHandler DisConnectedEvent;//连接失败

public delegate void ReceiveMsgEventHandler(byte[] order);
public event ReceiveMsgEventHandler ReceiveMsgEvent;

static Socket _socket = null;
static IPEndPoint iep = null;
static bool isConnecting = false;
static bool isConnected = false;

public SocketClientManager(string strIP,int port)
{
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress IP = IPAddress.Parse(strIP.Trim());
iep = new IPEndPoint(IP, port);
}

public void Start()
{
isConnecting = true;
Thread t = new Thread(Connect);
t.IsBackground = true;
t.Start();
}

private void Connect()
{
while (isConnecting)
{
try
{
if (!IsSocketConnected(_socket) && DisConnectedEvent != null)
{
DisConnectedEvent();
isConnected = false;
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_socket.Connect(iep);
ConnectedEvent();
isConnected = true;
Thread t = new Thread(ReceiveMsg);
t.IsBackground = true;
t.Start();
}
}
catch { }
finally
{
Thread.Sleep(500);
}
}
}

private void ReceiveMsg()
{
while (isConnected)
{
byte[] buffer = new byte[32];
int count = _socket.Receive(buffer);
if (count > 0&&ReceiveMsgEvent != null)
{
ReceiveMsgEvent(buffer);
}
}
}

public void SendMsg(byte[] order)
{
_socket.Send(order, order.Length, SocketFlags.None);
}

private bool IsSocketConnected(Socket s)
{
return !((s.Poll(1000, SelectMode.SelectRead) && (s.Available == 0)) || !s.Connected);
}
}

C#socket通讯客户端（连接状态监控，掉线重连）