HOw to add chatting in C# and ASP.NET

hello,
I want to add a feature - chatting - in my intranet based application.I am using C#.net and asp.net. i dont know anything about chatting in .net.please guide me what are the components or anything that can be helpful to me.
Thanks.

Jigs

http://www.java2s.com/Code/CSharp/Network/TcpChat.htm

http://www.codeguru.com/csharp/cshar...int.php/c6039/