title: Looking for .NET 4.5 Progress<T> source code
body: <p>I don't have .NET 4.5 installed (and I can't install it).</p>
  
  <p>Where can I find the source code of the new <code>System.Progress&lt;T&gt;</code> class ?</p>
  
  <p>(Or someone kind enough, with the .NET 4.5 beta installed, to copy/paste the code)</p>