title: Event to detect System wake up from sleep in C#
body: <p>I need to detect the system power state mode. To be precise, I need an event which fires up when windows 7 wakes up from sleep. I am already using:</p>
  
  <pre><code>SystemEvents.PowerModeChanged += SystemEvents_PowerModeChanged;
  </code></pre>
  
  <p>But the problem with this event is that it is raised up four times: possibly when computer goes into sleep mode and after computer wakes up. I want an event which is raised at computer wake up only. Is there any event for this?</p>