Develop Trial Versions for Your Windows Phone 7 App

Here is a very useful sample about it: 31 Days of Windows Phone | Day #23: Providing Trial Versions of Your App.

Related Topics:

• Creating Trial Applications for Windows Phone
  • Creating Trial Applications Overview for Windows Phone
  • How to: Implement a Trial Experience in a Silverlight Application for Windows Phone
  • How to: Implement a Trial Experience in an XNA Framework Application for Windows Phone
• Trial Applications Sample (XNA Framework)
• Trial Applications Sample (Silverlight)