title: Error "Cannot find governing FrameworkElement or FrameworkContentElement for target element" When UI is not yet loaded
body: <p>In my WPF application, I use a lot of Binding with a <strong>RelativeSource</strong> in <strong>FindAncestor</strong> mode.
  But WPF try to resolve those binding when the UI is not loaded yet or when elements are removed from the UI.<br>
  It cause a lot of error <code>Cannot find governing FrameworkElement or FrameworkContentElement for target element</code> in the console and a small freeze of the UI.</p>
  
  <p>Is there a way to tell WPF not to try to resolve binding until elements are loaded in the visual tree?</p>