[.NET] Unexpected error occurred in the .NET Framework...blah blah

• An unexpected error occurred in the .NET framework data provider for Microsoft SQL Server Compact 3.5. Please contact the provider vendor to resolve this problem.

  
  

  If you're getting the error above, while trying to view your connections or trying to generate a new entity data model, try this:

  
  

  Go to your registry.

  Navigate to:

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\DataProviders

  And delete anything that has .NET framework data provider for Microsoft SQL Server Compact