I am not sure exactly what my problem is but I am making a project with several forms that works with SQL Server to manage cars and one of the forms deals with listing all the cars in a listbox so they can be opened. The only problem is that each time the form is opened when the project is still being run in debug mode the items keep doubling. Each time the form is closed and then opened the same items apear again but there are two items of each. Can anyone help me. Thanks!