Third Party Live chat module for .NET (same as like Facebook)

I need to integrate private 开发者_开发问答chat module in Asp.NET site.So, internal user can chat with other users. I would be appreciate, if anyone can suggest that type of modules

Thanks in Advance.

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See here about rolling your own it shouldnt be too hard with the building blocks given ASP.NET Chat with WCF

You can check out http://wcfchat.codeplex.com/ for a WCF implementation of chat.