C# leave only collapse button?

Question

C++ / C#

There is an application in the tray. Those. click on the menu from the tray - a window opens, does something and collapses.
How can I leave only the collapse button in the top corner?

Answer 1

On OnClose we hang up the collapse event. Delov then

Answer 2

To disable the "maximize" button: MaximizeBox = false
To disable the "close" button: stackoverflow.com/a/7301828