客户端的代码 
class client

    {

        public void mehod()

        {

            TcpClient tcp = new TcpClient();

            tcp.Connect(IPAddress.Parse("192.168.0.168"), );

            NetworkStream stream = tcp.GetStream();

            string cmd = "demo TESTING";

            byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(cmd.ToCharArray());

            stream.Write(outbytes, , outbytes.Length);

            byte[] buffer = new byte[];

            int len = stream.Read(buffer, , buffer.Length);

            string msg = System.Text.Encoding.ASCII.GetString(buffer, , len);

            Console.WriteLine("客户端执行。。。。。。");

            new server().method();

            tcp.Close();

            Console.ReadLine();

        }

    }
服务端的代码：

 class server

    {

        public void method()

        {

            IPAddress ipaddress = IPAddress.Parse("192.168.0.168");

            TcpListener listener = new TcpListener(ipaddress, 23850);

            listener.Start();

            Console.WriteLine("服务端执行");

            Console.ReadLine();

            Socket socket = listener.AcceptSocket();

            byte[] buffer = new byte[1024];

            socket.Receive(buffer);

            string message = "hello";

            byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(message.ToCharArray());

            socket.Send(outbytes, message.Length, 0);

            socket.Close();

        }

    }