On Windows Phone 7, the system controls the lifetime of your application. When your game isn’t in the foreground, the system can (and almost certainly will) stop the process. In this appendix, we cover:
• What tombstoning is
• How to handle your application that is tombstoned
At the highest level, an application can have two states: It can either be running or it can be not running. Windows Phone 7 adds an extra state to the case where the application is not running. It can either be closed or it can be tombstoned. Tombstoning is when the process for the application is killed because it is no longer in the foreground, but the system remembers it because it might need to go back to ...