Write games for your Xbox 360 or PC using C# and XNA. Find out more here.
Sample code for "Microsoft® XNA® Game Studio 2.0: Learn Programming Now!" can be found here.
Simple SimonBuilding a Simon game together.
The second version of the XNA book from Rob Miles is now in the shops. You can find out more about it here.
If you want to obtain the code samples for this book you can find them here.