Checking if the backlight is active

When the backlight is inactive on a Symbol 9090G, a keypress activates the backlight, but it also acts as a regular keypress.  This was causing a problem for the users of my application so I needed to check if the backlight was active so I can ignore the keypress if it's inactive.  The solution was easy with the help of the Symbol SDK.

using Symbol.Display; publicclass ScreenHandler {  publicstaticbool IsBacklightOn {    get {      bool returnValue;      StandardDisplay display = null;      foreach (Device device in Device.AvailableDevices) {        if (device.DisplayType == DisplayType.StandardDisplay) {          display = new StandardDisplay(device);        }      }      if (display == null) {        returnValue = false;      } else {        returnValue = display.BacklightState == BacklightState.ON;        display.Dispose();      }      return returnValue;    }  } 
}

Update: In the previous version of this code, I wasn't disposing the display object.  That caused me far too many hours of frustration, because after around 25 calls to this method, the barcode scanner would stop scanning.