title: TabItem in a separate XAML
body: <p>Is it possible to put a TabItem into a separate XAML and reference something like this:</p>
  
  <pre><code>&lt;TabControl&gt;
       &lt;local:MyTabItem/&gt;
  &lt;/TabControl&gt;
  
  
  
  In Separate XAML:
  &lt;UserControl x:Class="MyProject.MyTabItem"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"&gt;
      &lt;TabItem Header="MyTab"&gt;
  
      &lt;/TabItem&gt;
  &lt;/UserControl&gt;
  </code></pre>
  
  <p>Of course it doesn't work, but I am wondering how can I do this?</p>