title: System.Net.Http is missing
body: <p>I am trying to download mp3 files using <code>HTTPClient</code> in <code>System.Net.Http</code> namespace, but it looks vs 2012 doesn't recognize it. I created project under .Net 4.5 and it's not recognized.</p>
  
  <p>I am looking to use <code>HttpClient</code>, I see some posts stating that add this from <code>NuGet</code>, but I don't how to find that in <code>NuGet</code>? or at least add a reference to this?</p>