This post will talk about tombstoning (what a name!) – the part of application lifecycle on Windows Phone 7. The Windows Phone execution model governs the life cycle of applications running on a Windows Phone, from when the application is launched until it is terminated. The execution model is designed to provide end users with a fast, responsive experience at all times. To achieve this, Windows Phone allows only one application to run at a time. This eliminates the possibility of users getting their...