Windows Phone 7 is a major shift in the way Microsoft developers design, develop, and sell mobile apps. By leveraging a trio of established technologies-Silverlight, XNA, and C# developers can blend what they already know about Windows development with the new opportunities and challenges presented by a mobile platform. And with exciting new Windows Phone devices rolling out now, the demand for WP7 apps is just starting to build. Windows Phone 7 in Action is a hands-on guide to building mobile applications for WP7 using Silverlight, C#, and XNA. Written for developers who already know their way around Visual Studio, this book zips through the basics, such as writing code to dial the phone, writing emails, and sending text messages, and moves on to the nuts and bolts of building great phone apps. By working through the numerous examples and tutorials, you'll master the APIs used to work with a phone's sensors and hardware, such as the accelerometer, camera, touch screen, GPS, and microphone. You'll also tackle web services and applications that use location and push notification services. Along the way, you'll discover why Microsoft opted for Silverlight and XNA as the core technologies for WP7. As with Silverlight for the desktop, you can create stunning visual effects using C#. Silverlight for Windows Phone has been enriched with navigation services, a new execution model to better satisfy mobile requirements, and hooks for embedding a browser, playing media files, running cool animations, and more. The XNA Framework provides libraries to handle 3D graphics, audio, and touch input. Because games are a key target of mobile app development, by the end of the book you will be able to write your own XNA game, utilizing the unique input abilities of the phone. You also learn how to tune your game code to get the best performance while running in the phone's constrained environment.