title: How to detach ICommand from element after it was executed?
body: <p>After the command was executed I'd like to detach it from <code>StackPanel</code>'s <code>PreviewMouseDown</code> event so it won't be called again. </p>
  
  <p>Is it possible to do?</p>
  
  <pre><code>&lt;StackPanel&gt;
      &lt;i:Interaction.Triggers&gt;
         &lt;i:EventTrigger EventName="PreviewMouseDown" &gt;
            &lt;GalaSoftMvvmLight:EventToCommand Command="{Binding MyCommand}"
                              PassEventArgsToCommand="False" /&gt;
         &lt;/i:EventTrigger&gt;
     &lt;/i:Interaction.Triggers&gt;
  &lt;/StackPanel&gt;
  </code></pre>