title: Timer in Portable Library
body: <p>I can't find a timer in portable library / Windows Store. (Targeting .net 4.5 and Windows Store aka Metro)</p>
  
  <p>Does any have an idea on how to created some kind of timing event?</p>
  
  <p>I need somekind of a stopwatch, so this should refreshn once a second or so</p>