Question

I have program that opens subwindows inside of it (mdi.parent). I have made component that is in one window under it, however, i want that that window never actually disposed after its created because i want to keep only one instance of it.

This can be made with code:

    // This prevents this window disposing from window close button, we want always show one and only
    // one instance of this window.
    FormClosing += (o, e) =>
                            {
                                Hide();
                                e.Cancel = true;
                            };

However, after this there is problem, closing program requires pressing close button press twice. First press closes subwindow and second terminates program. How this can be get around?

I am working with Winforms.

Answer 1

Call Application.Exit() in the form close event.

Application.Exit – MSDN

Informs all message pumps that they must terminate, and then closes
all application windows after the messages have been processed.