Hi
Nava Dviri,
The purpose of the .mdf file is to store all of the user related information - password, user name. When the login button is pressed the web service takes the provided name and password and check them into the data base .mdf file.
Regards,
Kaloyan Manev
the Telerik team
Check out
Telerik Trainer, the state of the art learning tool for Telerik products.