title: Caliburn.Micro TreeView add a static element
body: <p>I have a working TreeView </p>
  
  <pre><code>                        &lt;TreeView x:Name="TVAccess" ItemsSource="{Binding AccessLevel}" Grid.Row="1" Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.ColumnSpan="3"&gt;
                          &lt;TreeView.ItemTemplate&gt;
                              &lt;HierarchicalDataTemplate  &gt;
                                  &lt;StackPanel Orientation="Horizontal"&gt;
                                      &lt;!--&lt;CheckBox Checked="{Binding Checked}"/&gt;--&gt;
                                      &lt;TextBlock Text="{Binding Text}" /&gt;
                                  &lt;/StackPanel&gt;
                              &lt;/HierarchicalDataTemplate&gt;
                          &lt;/TreeView.ItemTemplate&gt;
                      &lt;/TreeView&gt;
  </code></pre>
  
  <p>It is bind to AccessLevel object defined like this</p>
  
  <pre><code>public BindableCollection&lt;UserLibrary.DataAccess.TextHelper.TreeViewItem&gt; AccessLevel { get; set; }
  </code></pre>
  
  <p>This works well
  The result is this </p>
  
  <p><a href="https://i.stack.imgur.com/cx5SK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cx5SK.png" alt="enter image description here"></a></p>
  
  <p>I would like to add a fixed first level named "Access Right", how can I do that?</p>
  
  <p>EDIT 1</p>
  
  <p>The structure I would like is this:</p>
  
  <p><a href="https://i.stack.imgur.com/N1gRW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/N1gRW.png" alt="enter image description here"></a></p>
  
  <p>Thank you for your help.</p>
  
  <h2>Edit 2 - The TreeViewItem class</h2>
  
  <pre><code>public class TreeViewItem
  {
      public string Text { get;  set; }
      public bool Checked { get;  set; }
  }
  </code></pre>
  
  <h2>Edit 3 - Modify the TreeViewItem Class</h2>
  
  <p>So if I mofify my call like this, now the problem is to bind it to the TreeView</p>
  
  <pre><code>    public class TreeViewItem
  {
      public string Text { get;  set; }
      public bool Checked { get; set; }
  
      public IEnumerable&lt;TreeViewItem&gt; SubTreeViewItem { get; set; } 
  }
  </code></pre>