WP7 sdk has some major holes though. For one thing, no native way to store user data. You can either use a simple key/value thing (only good for settings data)

WP7 sdk has some major holes though. For one thing, no native way to store user data. You can either use a simple key/value thing (only good for settings data) or you can use files. What I wound up doing was creating XML files that I serialized and deserialized as needed to store data. Not exactly a good solution as the data scales.