title: Monitor status query in c#
body: <p>I am looking for a way to check the monitor status in C# (.net framework 4.5, win8.1).</p>
  
  <p>(I know impossible to check, the user turn off the monitor manually, I do not want this. I want to check the system(the screen saver) turned it off, or not...)</p>
  
  <p>I found some info about SystemEvents.PowerModeChanged, but it is just only about sleep.</p>