private void OnTimedEvent(object source, ElapsedEventArgs e)
{
float DeltaFrames = theCameraDevice.GetFrameNumber() - PreviousNumberOfFrames;
FPS = (float)(DeltaFrames / (float)(TimerResolutionMiliSec / 1000.0f));
PreviousNumberOfFrames = theCameraDevice.GetFrameNumber();
}