Losing database update after changes in code

Question

I have a simple question. I'm new to .net and sql and I'm trying to write a small form application. I added a data source which I created in sql. I got textboxes, button to update tables in database. When I made changes in database, like adding or deleting rows from tables, these updates are getting lost if I made a little change in application code (for example entering a new line).
Probably I'm unaware of something simple. What is the cause of it?

Answer 1

Select the database from solution explorer, go to properties (or alt + enter) and change the Copy to Output Directory to Copy if newer (copy if you change the database) or Do not copy. If the selected option is Copy always, the database is copied each time the project is build.