Sometimes my design doesn’t look right when the screen is in landscape mode, and if the screen is in landscape mode I would like to hide some elements to improve the design or make some changes.
Something like what exists in CSS with mediaqueris: http://www.w3.org/TR/css3-mediaqueries/#orientation
<Text ux:Name="Description" Value="Test">
<WhileDisplayLandscape>
<Change Description.Visibility="Collapsed"/>
</WhileDisplayLandscape>