C # WinForm Resolves a problem when a subform is enlarged and the subform icon zooms in

When the subform is zoomed out, the icon for the subform occupies the main form's menu bar.

When the C # Subform is maximized, the icon runs to the front of the main form, causing the interface to be not uniform or beautiful.

So it needs to be processed as long as there is a menu ItemAdded event in the main form that adds the following code:

if (E.item.text.length = = 0 | | e.item.text = = "Restore (&r)" | | e.item.text = = "Minimize (&n)")
{
E.item.visible = false;
}

When you run the check again, you'll find that only one is closed, similar to Word style. If you want other buttons, set the | |

C # WinForm Resolves a problem when a subform is enlarged and the subform icon zooms in