I am sure everyone here has at least created snake, but for those who have not or are just starting out:
http://gamemakersforums.com/resources/1-crazy-snake.6/
It is my first C# App/Game as well as my first .NET app. I used C# 2013 with XNA 4. This was just more of a learning exercise then to create an actually game since I have not worked with C# or XNA before. I started last night, and just got it working fully (that I am aware of) a few hrs ago.
I guess next I will be looking into to see XNA has built in network stuff and do some multiplayer experiment's.