using System;
using System.Collections.Generic;
using System.Text;
//添加Socket类
using System.Net;
using System.Net.Sockets;namespace ScoketServer
{class Program{static void Main(string[] args){int port = 8080;string host = "17.1.1.78";//创建终结点IPAddress ip = IPAddress.Parse(host);IPEndPoint ipe = new IPEndPoint(ip, port);//创建Socket并开始监听
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //创建一个Socket对象，如果用UDP协议，则要用SocketTyype.Dgram类型的套接字s.Bind(ipe);    //绑定EndPoint对象(2000端口和ip地址)s.Listen(0);    //开始监听Console.WriteLine("等待客户端连接");//接受到Client连接，为此连接建立新的Socket，并接受消息Socket temp = s.Accept();   //为新建立的连接创建新的SocketConsole.WriteLine("建立连接");string recvStr = "";byte[] recvBytes = new byte[1024];int bytes;bytes = temp.Receive(recvBytes, recvBytes.Length, 0); //从客户端接受消息recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);//给Client端返回信息Console.WriteLine("server get message:{0}", recvStr);    //把客户端传来的信息显示出来string sendStr = "ok!Client send message successful!";byte[] bs = Encoding.ASCII.GetBytes(sendStr);temp.Send(bs, bs.Length, 0);  //返回信息给客户端
            temp.Close();s.Close();Console.ReadLine();}}
}

using System;
using System.Collections.Generic;
using System.Text;
//添加Socket类
using System.Net;
using System.Net.Sockets;namespace SocketClient
{class Program{static void Main(string[] args){try{int port = 8080;string host = "17.1.1.78";//创建中街店EndPointIPAddress ip = IPAddress.Parse(host);IPEndPoint ipe = new IPEndPoint(ip, port);  //把ip和端口转化为IPEndPoint的实例//创建Socket并连接到服务器Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //创建SocketConsole.WriteLine("Connecting...");c.Connect(ipe); //连接到服务器//向服务器发送信息string endStr = "Hello,this is a socket test";byte[] bs = Encoding.ASCII.GetBytes(endStr);  //把字符串编码为字节Console.WriteLine("Send message");c.Send(bs, bs.Length, 0); //发送信息//接受从服务器返回的信息string recvStr = "";byte[] recvBytes = new byte[1024];int bytes;bytes = c.Receive(recvBytes, recvBytes.Length, 0);   //从服务器端接收返回信息recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);Console.WriteLine("client get message:{0}", recvStr); //回显服务器的返回信息
                Console.Read();//一定要记着用完Socket后要关闭
                c.Close();}catch (ArgumentException e){Console.WriteLine("argumentNullException:{0}", e);}catch (SocketException e){Console.WriteLine("SocketException:{0}",e);}}}
}