Aether.Extras/Samples/Animation/GamePage.WP8.xaml

<phone:PhoneApplicationPage
    x:Class="Samples.Animation.GamePage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Landscape"  Orientation="Landscape"
    shell:SystemTray.IsVisible="False">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
		<!--Drawing surface for DirectX content - supports Landscape and Portrait-->
        <DrawingSurface x:Name="XnaSurface"/>

		<!-- Media element for audio -->
        <MediaElement></MediaElement>
		
    </Grid>
	
	<!-- 	Optionally replace the grid above with the following drawing surface grid, 
			it may yield better performance for portrait only games, however it
			Does NOT support landscape mode
	    <DrawingSurfaceBackgroundGrid x:Name="XnaSurface" Background="Transparent">
			<MediaElement></MediaElement>
		</DrawingSurfaceBackgroundGrid>
	-->

</phone:PhoneApplicationPage>