Silverlight for Windows Phone is the primary platform for writing Windows Phone 7 applications, and much of what you already know about Silverlight ports directly to the phone. However, Silverlight for Windows Phone includes many features Silverlight does not, such as support for accelerometers, location, push notifications, page orientation, launchers and choosers, and more. In addition, phone development requires an understanding of tombstoning – perhaps the greatest roadblock that Silverlight for Windows Phone puts in the path of developers. Phone development also requires knowledge of how to build rich touch interfaces. This session surveys these and other differences between Silverlight and Silverlight for Windows Phone and provides a crash course on phone development.