Try using a MainMenu
instead of a MenuStrip
. The MainMenu
will pick up the underlying operating system's current style, whereas the MenuStrip
does not. Even though MainMenu
was replaced with MenuStrip
, it is still supported going forwards (according to the MSDN docs).
MenuStrip
is rendered entirely in C# and does not use the current operating system's styles, whereas the MainMenu
control renders using the underlying OS API and does.
MainMenu
might not be in your toolbox. To add it, right click in the toolbox, select "Choose Items..." and then make sure the MainMenu item is checked.
This article explains the differences between MainMenu
and MenuStrip
in more depth.