MainPage.xaml

<UserControl x:Class="WriteableBitmapExBlitSample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
    <Grid x:Name="LayoutRoot" Width="640" Height="480">
        <StackPanel>
            <TextBlock HorizontalAlignment="Center" FontSize="14" Text="WriteableBitmapEx - Silverlight WriteableBitmap Extensions - Blit Sample" />
            <Border Width="640" Height="480" Background="Black">
                <Image x:Name="image" Width="640" Height="480"/>
            </Border>
        </StackPanel>
    </Grid>
</UserControl>