Because I did delete the DB file and now I get an error message when I run the application. I expected it was the DB file was deleted by me and it didn’t help me rebuild the DB.
To solve this issue, we need stop and delete the Database with follwing step:
1. Open Package Manager Console from Tools -> Libraray Package Manager -> Package Manager Console 2. Stop local DB with command: PM > sqllocaldb.exe stop v11.0 3. and then delete it PM > sqllocaldb.exe delete v11.0Now try run the application again. it will work fine again.