Decentralized Chat feature in C#/WPF?

What are some options for implementing a chat feature in a C#/WPF desktop application? Is it possible to do this without a central server? 开发者_JS百科

I have a desktop app and 1 user may be logged in at one time or 50 users may be logged in. I would like to add a chat feature that will allow them to talk to each other without relying on a central server. If I do have to use a central server, I assume that WCF would be the best option? Are there any solid examples of this with WCF?

Yes you can try using p2p binding from wcf take a look at this project.