服务器端代码

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
namespace SocketServer
{
    class Program
    {
        private static byte[] result = new byte[10];
        private static int myProt = 8885;   //端口  
        static Socket serverSocket;
        static void Main(string[] args)
        {
            //服务器IP地址  
            IPAddress ip = IPAddress.Parse("127.0.0.1");
            serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            serverSocket.Bind(new IPEndPoint(ip, myProt));  //绑定IP地址：端口  
            serverSocket.Listen(10);    //设定最多10个排队连接请求  
            Console.WriteLine("启动监听{0}成功", serverSocket.LocalEndPoint.ToString());
            //通过Clientsoket发送数据  
            Thread myThread = new Thread(ListenClientConnect);
            myThread.Start();
            Console.ReadLine();
        }
        /// <summary>  
        /// 监听客户端连接  
        /// </summary>  
        private static void ListenClientConnect()
        {
            while (true)
            {
                Socket clientSocket = serverSocket.Accept();
                clientSocket.Send(Encoding.ASCII.GetBytes("Server Say Hello"));
                Thread receiveThread = new Thread(ReceiveMessage);
                receiveThread.Start(clientSocket);
            }
        }
        /// <summary>  
        /// 接收消息  
        /// </summary>  
        /// <param name="clientSocket"></param>  
        private static void ReceiveMessage(object clientSocket)
        {
            Socket myClientSocket = (Socket)clientSocket;
            while (true)
            {
                try
                {
                    //通过clientSocket接收数据  
                    int receiveNumber = myClientSocket.Receive(result);
                    if (receiveNumber == 0)
                    {
                        break;
                    }
                    Console.WriteLine("接收客户端{0}消息{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.ASCII.GetString(result, 0, receiveNumber));
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    break;
                }
            }
            myClientSocket.Shutdown(SocketShutdown.Both);
            myClientSocket.Close();
        }
    }
}

客户端代码

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace SocketClient
{
    class Program
    {
        private static byte[] result = new byte[1024];
        static void Main(string[] args)
        {
            //设定服务器IP地址  
            IPAddress ip = IPAddress.Parse("127.0.0.1");
            Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            try
            {
                clientSocket.Connect(new IPEndPoint(ip, 8885)); //配置服务器IP与端口  
                Console.WriteLine("连接服务器成功");
            }
            catch
            {
                Console.WriteLine("连接服务器失败，请按任意键退出！");
                Console.Read();
                return;
            }
            //通过clientSocket接收数据  
            int receiveLength = clientSocket.Receive(result);
            Console.WriteLine("接收服务器消息：{0}", Encoding.ASCII.GetString(result, 0, receiveLength));
            try
            {
                string sendMessage = "client send Message Hello @ " + DateTime.Now;
                clientSocket.Send(Encoding.ASCII.GetBytes(sendMessage));
                Console.WriteLine("向服务器发送消息：{0}" + sendMessage);
            }
            finally
            {
                clientSocket.Shutdown(SocketShutdown.Both);
                clientSocket.Close();
            }
            Console.WriteLine("发送完毕，按回车键退出");
            Console.ReadLine();
        }
    }
}