how to make a chat application using wcf in asp.net

try this

 

http://blogs.msdn.com/b/theothersteve/archive/2010/04/19/how-to-create-a-peer-to-peer-chat-application-using-wpf-and-wcf-in-visual-studio-2010.aspx 

http://www.codeguru.com/csharp/csharp/cs_syntax/componentdevelopment/article.php/c13197/WCF-Chat-Application.htm

 

http://www.codeproject.com/Articles/17321/A-simple-peer-to-peer-chat-application-using-WCF-n 

Check this out 

 

http://www.codeguru.com/csharp/csharp/cs_syntax/componentdevelopment/article.php/c13197/WCF-Chat-Application.htm