title: Need to make full screen popup in WPF
body: <p>I want to open full screen popup but what is happening right now is that from the top it increases but bottom transparent or any color effect is not visible.Below is the code i am using .please let me know where i am wrong.Please see popup design <a href="https://drive.google.com/file/d/0B6NOGV7_pivmcTUtRnRyel9RcjQ/edit?usp=sharing" rel="nofollow">CLICK HERE</a></p>
  
  <pre><code>&lt;Popup  StaysOpen="False" x:Name="popintaling" Width="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}"  Placement="Center" IsOpen="False" Height="900"   Panel.ZIndex="1"  HorizontalAlignment="Center"  VerticalAlignment="Center" AllowsTransparency="True" PopupAnimation="Fade" ClipToBounds="True" OpacityMask="#FFFFAA00" RenderTransformOrigin="0,0" &gt;
              &lt;Popup.Effect&gt;
                  &lt;DropShadowEffect/&gt;
              &lt;/Popup.Effect&gt;
              &lt;Border  Width="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}" Height="900" BorderBrush="#7F1D1A1A" Margin="0,0,0,0" BorderThickness="300,300,300,300" HorizontalAlignment="Center" &gt;
  
                      &lt;Canvas Margin="0,100,0,90"  Height="800" Width="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}" Panel.ZIndex="999" HorizontalAlignment="Center"  VerticalAlignment="Center" Background="#FFF3800C" &gt;
               //some code here
                      &lt;/Canvas&gt;
  
              &lt;/Border&gt;
          &lt;/Popup&gt;
  </code></pre>