FileNotFoundException in xamarin.forms in sqlite implementation

In my project where i am using sqlite i get this error.

An exception of type 'System.IO.FileNotFoundException' occurred in SQLite.Net.Platform.WindowsPhone8.DLL but was not handled in user code

Here is screenshot.

P.S. i got value in variable path as C:\Data\Users\DefApps\AppData{F8267584-1051-4816-8195-EE018BA5155E}\local\Student.db3

Thanks