Wcf_chatter is a project mainly written in C#, it's free.
Example code demonstrating how to create a basic WCF service and client.
h3. Overview
This is a working example of a chat service written using the .NET framework and WCF. It is intended as a companion to my "WCF Tutorial":http://dongola7.github.com/2010/04/02/wcf-tutorial.html blog post.
h3. Running the example
Download the code from the GitHub repository. Open the solution in VS 2008 and build the solution. The @binDebug@ or @binRelease@ directory will contain both the @ChatServer@ and @ChatClient@ executables. Try executing a single server ad two clients on your system to see everything in action.