1 static void Main(string[] args)
 2         {
 3             int port = 2000;
 4             string host = "127.0.0.1";
 5 
 6             IPAddress ip = IPAddress.Parse(host);
 7             IPEndPoint ipe = new IPEndPoint(ip, port);
 8 
 9             Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
10             socket.Bind(ipe);
11             socket.Listen(0);  //监听
12             Console.WriteLine("waiting.......");
13 
14             //接受来自客户端发送的信息
15             Socket temp = socket.Accept();  //创建新的socket用于和客户端通信
16             Console.WriteLine("ok...");
17             string recstr = "";
18             byte[] recbyte = new byte[1024];
19             int bytes;
20             bytes = temp.Receive(recbyte, recbyte.Length, 0);
21             recstr += Encoding.ASCII.GetString(recbyte, 0, bytes);
22 
23             //给客户端返回信息
24             Console.WriteLine("server get message:{0}", recstr);
25             string sendstr = "client send message successful";
26             byte[] by = Encoding.ASCII.GetBytes(sendstr);
27             temp.Send(by, by.Length, 0);  //发送
28             temp.Close();                 //关闭
29             socket.Close();
30             Console.ReadLine();
31 
32         }

 1 static void Main(string[] args)
 2         {
 3             try
 4             {
 5                 int port = 2000;
 6                 string host = "127.0.0.1";
 7 
 8                 IPAddress ip = IPAddress.Parse(host);
 9                 IPEndPoint iped = new IPEndPoint(ip, port);
10 
11                 Socket soc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
12                 Console.WriteLine("waiting......");
13                 soc.Connect(iped);  //连接
14 
15                 //向服务端发送消息
16                 string sendstr = "hello,this is client message";
17                 byte[] bytes = Encoding.ASCII.GetBytes(sendstr);
18                 Console.WriteLine("send message");
19                 soc.Send(bytes);
20 
21                 //接受由服务端返回的信息
22                 string recstr = "";
23                 byte[] recbyte = new byte[1024];
24                 int bytess;
25                 bytess = soc.Receive(recbyte, recbyte.Length, 0);
26                 recstr += Encoding.ASCII.GetString(recbyte, 0, bytess);
27                 Console.WriteLine("get message:{0}", recstr);
28                 soc.Close();
29 
30             }
31             catch (Exception ex)
32             {
33                 Console.WriteLine("error");
34             }
35             Console.WriteLine("press enter exit");
36             Console.ReadLine();
37         }