I've installed SQL Compact 4.0 CTP 2 via WPI and used NUPack to add SQLCE.EntityFramework in my project. It compiles and run perfectly but I can't open the SDF file in Visual Studio 2010's Server Explorer.
When I try I always receive the following message:
I've already tried to uninstall and reinstall everything.
It cannot be opened in SQL Server 2008 R2 Management Studio also.
Please help!!
Installing this (Visual Studio 2010 SP1 Tools for SQL Server Compact 4.0) fixed this exact problem for me perfectly: http://go.microsoft.com/fwlink/?LinkId=212219
Props to ErikEJ from this thread: http://forums.asp.net/t/1811963.aspx/1