C# 3.5 or 2.0 Micrsoft P2P Chat

I need a working concept of Microsoft P2P used for messaging for a future project. I need a working concept of messaging/chat application based on Microsoft P2P. This is first of all to see how the application works in reality and how it can hold two conversations between multiple clients / 100++ Primary objectives for this application - Send messages between two or more participants in a chatsession where 100 or more clients is active ie very much like MSN/Yahoo. Secondary (optional) - implemented File transfer. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows XP Sp2, Windows Vista Sp1