What is an "exception" and how do i fix it in microsoft visual studio?

asked 2021-04-23T22:06:04.667+00:00
Daniel Shepherd 241 Reputation points

i am new to these concepts like "breakpoints" and "exceptions" in programming. i need help with a "exception." i have no build errors in my code, but it wont launch the program for some reason. please help!
here is a screenshot:

Windows Forms
Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
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