Q : My Project doesn't save!! , When i run my application i can edit my database but when i stop debugging i find my database records still the same with no changes?
A: Actualy you have 2 databases not one
the origional one in the project folder (that you see in your IDE)
the secondone in your projectFolder/bin/debug folder , its just for testing
every time you run your application the testing database will be replaced by fresh copy from the origional one so every time you debug you lose the previous changes
so you have some options to be able to see your database changes
1) see your changes in the database that lies in debug folder not the one in your project folder
2) select your database in your solution explorer and go to properties tab >> copy to output folder property >> select copy if newer
like that you stop the new copy every time you run your project , so willb be able to see your previous changes as long as you didn't change your database design, but still can't see the changes in the origional database in your solution explorer , the changes have been make to the copy in the debug folder
hope this helps