Hide form via C # keys [closed]

I am making a menu in C # and it only opens when the game is open or running, ie if the game is running show the menu, so far so good it runs, however I wanted to hide the menu for example by pressing F1 on the keyboard without using the minimize button of the form window, then show again when pressing the key until because using bordernone does not have the minimize or close buttons. already tried some tutorials on the net more as I am beginner I made the biggest mess here = /. can anybody help me? already grateful.