.sdf file is giving error to open

Question

This is my first ASP.NET MVC3 application and it is working and everything is fine except to open DB file (.sdf) in App_Data folder. I am getting error

the operation could not be completed. Unspecified error.

Things which is done from my side are:

1. All the operations like Show all files, Include in project etc.. are done on this folder and files.
2. SQL Server Compact 4.0 (runtime + tools support) is installed to my machine.

Thanks.

Answer 1

I had the same issue with MVC 4. Installing VS2010 SP1 fixed it for me.

VS2010 SP1