title: Trigger with boolean not working
body: <p>I'm trying to display a value in the ListView depending on the state of the boolean, but it does not work. Can you tell me what I'm doing wrong?</p>
  
  <pre><code>&lt;ListView x:Name="LiViTest" Grid.ColumnSpan="4" Margin="0,0.01,0,0" Grid.Row="1" SelectionMode="Single"&gt;
      &lt;ListView.View&gt;
          &lt;GridView&gt;
              &lt;GridViewColumn Header=" numb " &gt;
              &lt;GridViewColumn.CellTemplate&gt;
              &lt;DataTemplate&gt;
                  &lt;StackPanel Orientation="Horizontal"&gt;
                  &lt;TextBlock x:Name="TxtTest" /&gt;
                  &lt;/StackPanel&gt;
                  &lt;DataTemplate.Triggers&gt;
                      &lt;DataTrigger Binding="{Binding Path=boolTest}"&gt;
                          &lt;DataTrigger.Value&gt;
                              &lt;sys:Boolean&gt;False&lt;/sys:Boolean&gt;
                          &lt;/DataTrigger.Value&gt;
                          &lt;Setter TargetName="TxtTest" Property="Text" Value="test false"/&gt;
                      &lt;/DataTrigger&gt;
                      &lt;DataTrigger Binding="{Binding Path=boolTest}"&gt;
                          &lt;DataTrigger.Value&gt;
                              &lt;sys:Boolean&gt;True&lt;/sys:Boolean&gt;
                          &lt;/DataTrigger.Value&gt;
                          &lt;Setter TargetName="TxtTest" Property="Text" Value="test true"/&gt;
                      &lt;/DataTrigger&gt;
                  &lt;/DataTemplate.Triggers&gt;
              &lt;/DataTemplate&gt; 
              &lt;/GridViewColumn.CellTemplate&gt;
              &lt;/GridViewColumn&gt;
          &lt;/GridView&gt;
      &lt;/ListView.View&gt;
  &lt;/ListView&gt;
  </code></pre>