title: ComboBox push the controls under it
body: <p>Like any combobox in WP when the combobox is opened (expanded) it pushes the controls under it down.
  In my app when it is opened some of it is hidden because another control is over it.
  How can i make all the controls goes down when the combo box is opened.
  I want to make like this
  <img src="https://i.stack.imgur.com/RZQfW.png" alt="Right ComboBox"></p>
  
  <p>What i have is like this</p>
  
  <p><img src="https://i.stack.imgur.com/SSvcn.png" alt="what i have"></p>
  
  <p>--EDIT
  My xaml Code is</p>
  
  <pre><code>&lt;Grid x:Name="addingBabyGrid" HorizontalAlignment="Center" Height="412" VerticalAlignment="Center" Width="323"&gt;
              &lt;Grid.Background&gt;
                  &lt;SolidColorBrush Color="White" Opacity="0.9"/&gt;
              &lt;/Grid.Background&gt;
              &lt;StackPanel Orientation="Vertical"&gt;
                  &lt;TextBox HorizontalAlignment="Center" Height="41" TextWrapping="Wrap" Text="Name" VerticalAlignment="Top" Width="303"/&gt;
                  &lt;ComboBox HorizontalAlignment="Center" Height="53" Width="298" RequestedTheme="Light" Background="Black"&gt;
                      &lt;ComboBoxItem Content="Male"/&gt;
                      &lt;ComboBoxItem Content="Female"/&gt;
                  &lt;/ComboBox&gt;
                  &lt;DatePicker Width="293" HorizontalAlignment="Center" Foreground="White" Background="Black" BorderBrush="#FF7E7E7E" RequestedTheme="Light"/&gt;
              &lt;/StackPanel&gt;
          &lt;/Grid&gt;
  </code></pre>