Windows Phone 7 Jump Start (Slides, Demos, and Video Tutorials): 19 sessions
Windows Phone MVPs Rob Miles and Andy Wigley train developers to build amazing applications and games for Windows Phone 7.
Andy and Rob provide a good bit of humor along with their incredible depth of knowledge. There are 19 self-paced sessions in total, each about 50 minutes. Think of this as a semester's worth of class time to help you in your quest to become an awesome Windows Phone 7 developer.
You will find the Slides and Demos here.
Session 4: Building Games for the Windows Phone 7 Platform
Session 5: Building XNA Games for the Windows Phone 7 Platform, Part 1
Session 6: Building XNA Games for the Windows Phone 7 Platform, Part 2
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