Local Database Support for Windows Phone 7

I Was Searching for some Local Database support for Windows Phone 7 in Google and Ended up with the list here .1. db4o - Windows Phone databasedb4o is an object based database that can be used in the silverlight applications / Windows Phone Application .It offers you a lightweight persistence engine that stays close to your .NET objects and is a 100% .NET native code .The db4o site also states that