title: How to get the current time in a WPF game? (No XNA)
body: <p>I am trying to make a small game like app that has some interaction, but need an accurate enough time to evaluate the game.</p>
  
  <p>I saw some java versions using this method called <code>System.nanoTime</code>.</p>
  
  <p>Is there a .NET version for it?</p>
  
  <p>More importantly I am looking for a some sort of timer that I can use to evaluate the world. Should I be using an actual timer control and subscribe to it?</p>
  
  <p>Also the game evaluates on a different thread than the UI thread. Just in case this makes a difference.</p>