And for the record, creating a new instance of a form class is only half the battle. You can create and cache instances for later use ... but if you don't call Form.Show() or Form.ShowDialog() ... which Application.Run() does ... nothing happens.

In theory just instantiating a new form would allocate some memory and call its constructor, but I think the compiler will recognize that you're never using the object, and optimize it out of the final code.

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