title: call a Flyout in code behind like xaml in a universal App
body: <p>I have this Flayout when I clic on the button "btn7":</p>
  
  <pre><code>    &lt;Button HorizontalAlignment="Stretch" Background="Transparent"  x:Name="btn7" &gt;  
  &lt;Button.Flyout&gt;
       &lt;Flyout Placement="Right" x:Name="FlayoutLo" &gt;
          &lt;Grid VerticalAlignment="Bottom" HorizontalAlignment="Stretch" Margin="10" Width="250"&gt;
             &lt;Grid.RowDefinitions&gt;
                   &lt;RowDefinition Height="*"/&gt;
                   &lt;RowDefinition Height="*"/&gt;
                   &lt;/Grid.RowDefinitions&gt;                                  
                       &lt;TextBox x:Name="tt" VerticalAlignment="Bottom" Grid.Row="0" &gt;&lt;/TextBox&gt;
                       &lt;Button Width="120" FontWeight="Normal" Content="Enregistrer"  Background="#393185" Foreground="white" Margin="0,20,0,0"  x:Name="SecondBtn"  Grid.Row="1"   /&gt;
              &lt;/Grid&gt;
        &lt;/Flyout&gt;
     &lt;/Button.Flyout&gt;
  &lt;/Button&gt;
  </code></pre>
  
  <p>I have an other Button,that I want to show the same Flyout at the same placement like the button "btn7" but whith C#,I have tried this:</p>
  
  <pre><code> private  void MenuButton_Click(object sender, RoutedEventArgs e)
          {
      FlayoutLo.ShowAt(btn7);
  }
  </code></pre>
  
  <p>but I get nothing when I clic on "MenuButton",how can I solve this problem
  thanks for help</p>