What kind of playful method is Paint? (DataGridViewImageCell.Paint(...))

Can you believe the MessageBox can show even when the program stopped and the project returned to the design mode after clicking on "Stop debugging"?

I couldn't believe that until I tried inserting a command executing MessageBox.Show(...) into the body of the method Paint(...).

That's for I want to know when this method is called. I realized that it will be called whenever the DataGridView is redrawn, even when the project in design mode.

Could you please explain me how it works? As far as I know, the method will be called directly or indirectly when some event occurs. But I don't see any events associating with that method in the properties window, and even when there's one event for it (for example Paint event) how can it be called when all debugging or compiling or running stopped? Yes, if you do like me, you can't continue designing and coding your project because whenever the main form containing the datagridview with that "playful" method called Paint is redrawn or repainted, it will show a message box, clicking on the OK button will repaint the datagridview anew and a new message box will appear, that makes a loop of calling Paint.
Is there any other method of the same kind to that Paint?

Thank you so much!

Tags: C#