c# socket初学小demo

        static Socket ClientSocket;

        public void Send()
        {
            String IP = "127.0.0.1";
            int port = 8885;

            IPAddress ip = IPAddress.Parse(IP);  //将IP地址字符串转换成IPAddress实例
            ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//使用指定的地址簇协议、套接字类型和通信协议
            IPEndPoint endPoint = new IPEndPoint(ip, port); // 用指定的ip和端口号初始化IPEndPoint实例
            ClientSocket.Connect(endPoint);  //与远程主机建立连接


            Console.WriteLine("开始发送消息");
            string send=Console.ReadLine();
            byte[] message = Encoding.UTF8.GetBytes(send);  //通信时实际发送的是字节数组，所以要将发送消息转换字节
            ClientSocket.Send(message);
            Console.WriteLine("发送消息为:" + send);
            byte[] receive = new byte[1024];
            int length = ClientSocket.Receive(receive);  // length 接收字节数组长度
            Console.WriteLine("接收消息为：" + Encoding.UTF8.GetString(receive));
            ClientSocket.Close();  //关闭连接
        }

        static Socket ReceiveSocket;
        public void Receive()
        {
            int port = 8885;
            IPAddress ip = IPAddress.Any;  // 侦听所有网络客户接口的客活动
            ReceiveSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//使用指定的地址簇协议、套接字类型和通信协议   <br>                   
 //ReceiveSocket.SetSocketOption(SocketOptionLevel.Socket,SocketOptionName.ReuseAddress,true);  //有关套接字设置
            IPEndPoint endPoint = new IPEndPoint(ip, port);
            ReceiveSocket.Bind(new IPEndPoint(ip, port)); //绑定IP地址和端口号
            ReceiveSocket.Listen(10);  //设定最多有10个排队连接请求
            Console.WriteLine("建立连接");
            Socket socket = ReceiveSocket.Accept();

            byte[] receive = new byte[1024];
            socket.Receive(receive);
            Console.WriteLine("接收到消息：" + Encoding.UTF8.GetString(receive));
            string test=Console.ReadLine();
            byte[] send = Encoding.UTF8.GetBytes(test);
            socket.Send(send);
            //ASCII
            Console.WriteLine("发送消息为：" + Encoding.UTF8.GetString(send));
        }