any open source instant messenger?

Posted by George2 on Stack Overflow See other posts from Stack Overflow or by George2
Published on 2010-03-28T16:23:44Z Indexed on 2010/03/28 16:33 UTC
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c#

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vsts2008

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.NET

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instant-messaging

Hello everyone,

I need to develop an instant messenger (like MSN Messagner, but only simple and basic function is fine), based on .Net (C#). I want to integrate the instant messenger with my current web site user. I want to know any open source (better C#) instant messenger to reference?

BTW: some of the users are using internal IP address (behind a gateway or proxy, like 10.10.xxx.xxx) -- so in this scenario two users can not use point to point message transfer if both of them are behind a gateway? And I think I have to develop a server which acts as an intermediate party to transfer message between two users, correct?

thanks in advance, George

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