Just a short note to let you know, that the SQL Server Compact Toolbox add-in has been updated beginning of this month to support the following new features:
Generation of a LINQ to SQL DataContext for Windows Phone 8 projects in Visual Studio 2012. (Like Windows Phone 7.5, Windows Phone 8 supports a so-called “Local Database”, which is a SQL Server Compact Database accessible only via LINQ to SQL). This feature will allow you to generate a Phone specific DataContext, I have blogged about this earlier as you can see under the heading ErikEJ on this page.
In addition, the Toolbox is now able to use sqlmetal.exe on “clean” Windows 8 systems, with only Visual Studio 2012 Pro or higher installed.
Also note, that the Toolbox supports SQL Server Compact 3.5 database files even under VS 2012, despite the fact, that the VS 2012 Server Explorer no longer supports SQL Server Compact 3.5 (this requires the SQL Server Compact 3.5 SP2 desktop MSI to be installed, of course – download from here.