Database file .sdf does not update after closing application

Question

I am creating a Desktop application using Microsoft Visual Studio .NET 2008. I am using a .sdf file as my database. My problem is that when I am making changes to my records

Answer 1

explores solutions occurs if you have not set to 'Copy always' the 'Copy to Output Directory' of database.sdf

The current connection string and field application, and can not be changed and will be called each time to connect to DataBase

Bye