title: C#/MonoTouch starter: How to change the color of a Label periodically?
body: <p>i'm pretty new to programming in C# so please don't be mean with the following question.
  I want to change the Background color of a label (MonoTouch) periodically, but it simply does't.
  Anyway, the value of "_hue" is printed in the console periodically.</p>
  
  <pre><code>            public void _timer_elapsed(object sender, ElapsedEventArgs e)
          {
              _hue -= 0.1f;
              lblScreen.BackgroundColor = UIColor.FromHSB (_hue,_sat,_bri);
              Console.WriteLine (_hue);
          }
  </code></pre>
  
  <p>Do you guys have a hint?</p>
  
  <p>THANX! :-)</p>