title: Show/hide Mahapps Flyout control
body: <p>How can I show/hide <strong>MahApps Flyout</strong> control? Now I have:</p>
  
  <pre><code>&lt;controls:FlyoutsControl&gt;
      &lt;controls:Flyout Header="Flyout" Position="Right" Width="200" IsOpen="True"&gt;
          &lt;TextBlock FontSize="24"&gt;Hello World&lt;/TextBlock&gt;
      &lt;/controls:Flyout&gt;
  &lt;/controls:FlyoutsControl&gt;
  </code></pre>
  
  <p>And it's open, but when I click the button with arrow I can't show it again. </p>