Book excerpt: Discover the core concepts essential for developing apps for Windows Phone Silverlight and XNA provide you with a powerful development platform and key tools for programming Windows Phone 7 series applications. This book offers a foundation for using the tools required for Windows Phone 7 development, including Visual Studio 2010 Express Edition, the Windows Phone 7 Series SDK, and Silverlight. Experienced authors provide you with detailed coverage on developing accordingly for an application’s lifetime, accessing cloud services, and developing notification services. Explains how to use the most up-to-date tools and development platforms to create applications for the Windows Phone 7 Walks you through developing notification services and location services Demonstrates ways to generate revenue by deploying your apps to the Windows Phone Marketplace Details the steps for enabling trial periods for applications and providing updates and new versions of apps If you're eager to get started developing applications for the Windows Phone 7, then this is the beginner guide for you.