title: WPF ListView no scrollbar if height set to auto
body: <p>Hi i have a ListView that binds to a collection. I set the height of the ListView to auto for it to take up all the space in the region. However there is not scrollbar after i set the height to auto. If i give it a height then the scrollbar would show up.</p>
  
  <p>the markup is pretty much like the following</p>
  
  <pre><code>&lt;Grid&gt;
     &lt;StackPanel&gt;
        &lt;Expander&gt;
            &lt;DataGrid&gt;
        &lt;Expander&gt;
            &lt;ListView&gt;
  </code></pre>