title: Binding IsEnabled not Working
body: <p>I´m having a Problem with the IsEnabled property of my Buttons.</p>
  
  <p>This is my Button Style:</p>
  
  <pre><code>        &lt;Style x:Key="Button_selectable" TargetType="{x:Type Button}"&gt;
          &lt;Setter Property="FontSize" Value="15"/&gt;
          &lt;Setter Property="SnapsToDevicePixels" Value="True"/&gt;
  
          &lt;Setter Property="Template"&gt;
              &lt;Setter.Value&gt;
                  &lt;ControlTemplate TargetType="{x:Type Button}"&gt;
                      &lt;Border CornerRadius="5" Background="{TemplateBinding Background}" BorderThickness="1" BorderBrush="Black" Margin="1,1,1,1"&gt;
                          &lt;Grid&gt;
                              &lt;ContentPresenter Content="{TemplateBinding Content}" HorizontalAlignment="Center" VerticalAlignment="Center"/&gt;
                          &lt;/Grid&gt;
                      &lt;/Border&gt;
                  &lt;/ControlTemplate&gt;
              &lt;/Setter.Value&gt;
          &lt;/Setter&gt;
          &lt;Style.Triggers&gt;
              &lt;DataTrigger Binding="{Binding Path=Tag, RelativeSource={RelativeSource Self}}" Value="True"&gt;
                  &lt;Setter Property="Background" Value="MediumSlateBlue"/&gt;
              &lt;/DataTrigger&gt;
              &lt;DataTrigger Binding="{Binding Path=Tag, RelativeSource={RelativeSource Self}}" Value="False"&gt;
                  &lt;Setter Property="Background" Value="white"/&gt;
              &lt;/DataTrigger&gt;
          &lt;/Style.Triggers&gt;
      &lt;/Style&gt;
  </code></pre>
  
  <p>Usage:</p>
  
  <pre><code>&lt;Button Command="{Binding command}" IsEnabled="{Binding Enable}" x:Name="button" Content="Button1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" FontSize="13.333" Style="{StaticResource Button_selectable}" Tag="{Binding State}"/&gt;
  </code></pre>
  
  <p>Without my Sytle the IsEnabled property is working correct. But if I use this Sytle, the Button is always Enabled.
  I googled hours,... but I found nothing :-(</p>
  
  <p>Thanks for help!</p>