title: WPF Bind to ViewModel of another element
body: <p>Just an example. The CustomControl has a ViewModel with a property called "Test"</p>
  
  <p>How could I bind the textbox to that specific property?
  Can you access the siblings ViewModel?</p>
  
  <pre><code>&lt;TextBox Text="{Binding ElementName=myControl, Path=ViewModel.Test}"&gt;&lt;/TextBox&gt;
  &lt;Controls:CustomControl x:Name="myControl" /&gt;
  </code></pre>