Unable to update database .MDF is Read Only

Question

I have a local DB that I have in an application. When I install it on another machine I get the error

Unable to update database.. .mdf is read only.<

Answer 1

I solved the same problem as follows:

While creating "Setup", I manually added my database files database.mdf and database_log.ldf into the Application Folder file. But after adding these files, make sure that the ReadOnly option in the Properties section is False.

Also "connectionString" I use:

connectionString="Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\database.mdf;Integrated Security=True;Connect Timeout=30"