title: JSON.net error after importing XBox Live services
body: <p>I've added the <a href="https://github.com/Microsoft/xbox-live-unity-plugin/releases" rel="nofollow noreferrer">XBox Live Unity asset package</a> to my project and I'm getting this error in Unity. It doesn't show in Visual Studio strangely but it stops me from running my app.</p>
  
  <pre><code>error CS7069: Reference to type `System.ComponentModel.INotifyPropertyChanging' claims it is defined assembly `System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089', but it could not be found
  </code></pre>
  
  <p>The line the error refers to is as follows</p>
  
  <pre><code>JObject response = JsonConvert.DeserializeObject( request.text ) as JObject;
  </code></pre>
  
  <p>request is a Unity <code>WWW</code> object. 
  I was using <a href="https://www.assetstore.unity3d.com/en/#!/content/11347" rel="nofollow noreferrer">this asset package</a> in my app but I've removed it as it looks like XBox Live includes a precompiled dll of this already?</p>