We have existing client software written in .net/C# and want to ADD chat functionality to it.
I'm looking for a developer who has experience with live chatting software and file sharing. I need to see examples of your work either with a custom written app in .net/c# or an open source solution you've customized.
The features we are looking to implement are:
1. Live chat
2. File sharing between users
3. Username creation and management
4. Usergroups to manage friends
5. Friends List
I require full source code from winning bid.
Only developers with a working example will be considered.