title: Use both ValidationAdornerSite and ErrorTemplate at the same time
body: <p>We display our Errors via an Validation.ValidationAdornerSite in the StatusBar. With the usage of the ValidationAdornerSite, it seems that wpf disables the Validation.ErrorTemplate.</p>
  
  <p>What can I do to achieve both the display of the ErrorTemplate? We currently have a compromise where we only display stuff at the ValidationAdornersite by setting it on MouseOver via Trigger, so that the ErrorTemplate is displayed as long as the mouse is outside the control.</p>
  
  <pre><code> &lt;Style x:Key="ValidationStyle"&gt;
      &lt;Setter Property="Validation.ErrorTemplate"
              Value="{StaticResource Default_ErrorTemplate}" /&gt;
      &lt;Style.Triggers&gt;
          &lt;Trigger Property="UIElement.IsMouseOver"
                   Value="True"&gt;
              &lt;Setter Property="Validation.ValidationAdornerSite"
                      Value="{Binding ValidationAdornerSite,RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window}}" /&gt;
          &lt;/Trigger&gt;
  
          &lt;Trigger Property="Validation.HasError"
                   Value="true"&gt;
              &lt;Setter Property="FrameworkElement.ToolTip"
                      Value="{Binding RelativeSource={x:Static RelativeSource.Self},
                      Path=(Validation.Errors)[0].ErrorContent}" /&gt;
          &lt;/Trigger&gt;
      &lt;/Style.Triggers&gt;
  &lt;/Style&gt;
  </code></pre>