Windows platforms only. Sets your application so it has sole full-screen use of a display.
Unlike FullScreenMode.FullScreenWindow, this mode changes the operating system resolution of the display to match the application's chosen resolution. On platforms other than Windows, this mode falls back to FullScreenMode.FullScreenWindow.
Notes: 
FullScreenMode.ExclusiveFullScreen isn't supported in applications using the Vulkan graphics API.FullScreenMode.ExclusiveFullScreen might negatively affect performance of your application. Consider using other full-screen modes, such as FullScreenMode.FullScreenWindow.