title: UWP inherit from a class inherited from UserControl
body: <p>I am porting a Silverlight application to UWP Windows 10 app. </p>
  
  <p>Large part of it has controls, inherited from a class, which inherits from UserControl.</p>
  
  <pre><code>base:
  public abstract class PartBase : UserControl, IPart, IDisposable
  
  concrete:
  public sealed partial class MyPart : PartBase 
  
  its XAML:
  &lt;local:PartBase 
  </code></pre>
  
  <p>I get compilation error : The name "PartBase" does not exist in the namespace ..</p>
  
  <p><strong>Is inheritance permitted in UWP ?</strong></p>