I have ASP.NET 4 Web Application that connects with SQL SERVER 2005/2008
I want to add a \"chat\" feature to my application users.
Supposing the feature will
You should look at SignalR - which is pretty good and less configuration required for it.
SignalR Project - http://signalr.net/
SignalR, Simple Implementation - http://rizwanahmed.net/?p=227
If you have more questions let me know...
Thanks, Riz