On the Debug menu, click Start Without Debugging to run the application.

Type in a first name and a last name, and then select a tower from the list. Click Add. In the message box that appears displaying the member data you entered, click OK.

Try and close the form. In the message box that appears, click No.

The form should continue running.

Try and close the form again. In the message box, click Yes.

This time the form closes and the application finishes.