using System.Net.Sockets;using System.Net;using System.IO;using System.Threading;public class ChatServer{private int port = 54321; //端口號private IPAddress ip = IPAddress.Parse("10.20.30.40"); //ip地址private TcpListener tcpListener= null;private TcpClient tcpClient = null;private NetworkStream networkStream = null;private BinaryReader reader;//private BinaryWriter writer;private string getInfo = string.empty;//開始監聽private void btnStartListen_Click(object sender, EventArgs e){   tcpListener= new TcpListener( ip , port);   tcpListener.Start(); //開始監聽   Thread acceptClientMsgThread= new Thread(AcceptClientMsg);   //運行一個線程去處理客戶端發來的信息   acceptClientMsgThread.Start();}//處理客戶端發來的信息private void AcceptClientMsg() {  tcpClient = tcpListener.AcceptTcpClient();  if( tcpClient != null)  {    networkStream = tcpClient.GetStream();    reader = new BinaryReader( networkStream);    while (true){     getInfo += reader.ReadString();  //讀取客戶端發來的信息    }  }}//假如還要顯示信息的話,可以整個顯示按鈕(當然最好的辦法是用些線程)//然后點擊button后讓信息顯示出來txtShowClientMsg.Text = getInfo;//如果服務器端想再給客戶端發信息,就可以整個發送按鈕.然后添加如下代碼//string sendMsg = txtSendMsge.Text;//writer = new BinaryWriter( networkStream);//writer.write( sendMsg);}

using System.Net.Sockets;using System.Net;using System.IO;using System.Threading;public class ChatClient{ private int port = 54321;private IPAddress ip = IPAddress.Parse("10.20.30.40");private TcpClient tcpClient = null;private NetworkStream networkStream = null;//private BinaryReader reader;private BinaryWriter writer;//連接serverprivate void btnStartConnect_Click(object sender, EventArgs e){ tcpClient = new TcpClient(); tcpClient.Connect( ip, port); networkStream = tcpClient.GetStream();}//發送信息private void btnStartConnect_Click(object sender, EventArgs e){ string sendMsg = txtSendMsg.Text; writer = new BinaryWriter( networkStream); writer.Write( sendMsg); //發送信息}//如果還要接受server的消息的話.//reader = new BinaryReader( networkStream);//string getInfo = reader.ReadString();}