title: Where are the Windows Phone APIs in Windows XAML Universal Portable Library?
body: <p>I have a library for Windows Phone 8.0 and Windows 8 and thought to make the same to support the Windows Phone 8.1 and Windows 8.1 Universal applications.</p>
  
  <p>But soon as I tried to port my code in a Universal XAML library or even when trying some APIs in a Windows Phone 8.1 Universal Application that is created using the template I've seen that are missing, for example,</p>
  
  <pre><code>using Microsoft.Phone.Info;
  using Microsoft.Phone.Net.NetworkInformation;
  </code></pre>
  
  <p>Or I was using the PhoneApplicationFrame class, RootFrame in the App.xaml.cs file that is now too changed dramatically.</p>
  
  <p>Where do I find these namespaces to get information related to the device?</p>