title: TextBlock Wrap and scrollView
body: <p>The code below is working nice but the vertical <code>ScrollBar</code> is disabled even if large text inside of <code>TextBlock</code>. How can I enable it?</p>
  
  <pre><code> &lt;UserControl.DataContext&gt;
          &lt;viewModels:CommentsViewModel/&gt;
      &lt;/UserControl.DataContext&gt;
      &lt;Grid&gt;
          &lt;DockPanel &gt;
              &lt;TreeView DockPanel.Dock="Top"/&gt;
              &lt;Expander Header="Yo" DockPanel.Dock="Bottom" VerticalAlignment="Bottom"&gt;
                  &lt;ScrollViewer HorizontalScrollBarVisibility="Disabled"&gt;
                      &lt;TextBlock TextWrapping="Wrap"  MaxHeight="250" 
                           Text="{Binding Article.Article.Content}"/&gt;
                  &lt;/ScrollViewer&gt;
              &lt;/Expander&gt;
          &lt;/DockPanel&gt;
      &lt;/Grid&gt;
  </code></pre>