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PDF: Programming Windows Phone 7 Series
XPS: Programming Windows Phone 7 Series
Source code (March CTP)
Source code (April CTP)
Source code (July Beta)

Errata

Page 12: The bullet item Speech should be deleted.

Interviews

With Scott Hanselman: Hanselminutes Podcast 207 - Charles Petzold on Windows Phone 7 Series.

On the .NET Zone: Interview with Charles Petzold on WP7 Development and More

Updates

The July Beta of the Windows Phone 7 programming tools is now available. Updated source code for this book is also available.