title: Trigger when condition is not equal to
body: <p>I need a <code>Style</code> under WPF that sets several properties when multiple conditions are fullfilled. However, one of my conditions is of type <code>Not Equal To</code>. How should I change the below <code>Style</code> so that the condition would become <code>Not Equal To</code>? Can it be even achieved without <code>IValueConverter</code>?</p>
  
  <pre><code>&lt;Style&gt;
      &lt;Style.Triggers&gt;
          &lt;MultiDataTrigger&gt;
               &lt;MultiDataTrigger.Conditions&gt;
                    &lt;!--&lt;Condition 1 here.../&gt;--&gt;
                    &lt;!--&lt;Condition 2 here.../&gt;--&gt;
                    &lt;Condition Binding="{Binding Path=id}" Value="3"/&gt;
               &lt;/MultiDataTrigger.Conditions&gt;
               &lt;Setter Property="Background" Value="Red"/&gt;
               &lt;Setter Property="Foreground" Value="Black"/&gt;
           &lt;/MultiDataTrigger&gt;
      &lt;/Style.Triggers&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p>I would need the below but this of course don't work since Triggers only support <code>Equal</code> operator.</p>
  
  <pre><code>&lt;Style&gt;
      &lt;Style.Triggers&gt;
          &lt;MultiDataTrigger&gt;
               &lt;MultiDataTrigger.Conditions&gt;
                    &lt;!--&lt;Condition 1 here.../&gt;--&gt;
                    &lt;!--&lt;Condition 2 here.../&gt;--&gt;
                    &lt;Condition Binding="{Binding Path=id}" Value&lt;&gt;"3"/&gt;
               &lt;/MultiDataTrigger.Conditions&gt;
               &lt;Setter Property="Background" Value="Red"/&gt;
               &lt;Setter Property="Foreground" Value="Black"/&gt;
           &lt;/MultiDataTrigger&gt;
      &lt;/Style.Triggers&gt;
  &lt;/Style&gt;
  </code></pre>