TcpSocket编程与Event编写学习的好例子

http://www.codeproject.com/cs/internet/ChatAsynchTCPSockets.asp
A Chat Application Using Asynchronous TCP Sockets

http://www.codeproject.com/cs/internet/TCPIPChat.asp
TCP/IP Chat Application Using C#

 
C# Socket编程 : http://www.cnblogs.com/hzuIT/articles/682694.html