WPF Fallback Brush

<Window x:Class="FallbackBrushDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:c="clr-namespace:FallbackBrushDemo"
        Title="MainWindow" Height="350" Width="525">
    <Grid x:Name="root"  Background="{c:RemoteBrush PrimaryBrush=Pink, SecondaryBrush=Orange}">
        <Button Content="Button" Height="154" Foreground="White" HorizontalAlignment="Left" Margin="95,77,0,0" Name="button1" VerticalAlignment="Top" Width="304" Click="button1_Click">
            <Button.Background>
                <c:RemoteBrush>
                    <c:RemoteBrush.PrimaryBrush>
                        <SolidColorBrush Color="Yellow"></SolidColorBrush>
                    </c:RemoteBrush.PrimaryBrush>
                    <c:RemoteBrush.SecondaryBrush>
                        <LinearGradientBrush>
                            <GradientStop Color="LimeGreen" Offset="0"></GradientStop>
                            <GradientStop Color="DarkGreen" Offset="0.9"></GradientStop>
                        </LinearGradientBrush>
                    </c:RemoteBrush.SecondaryBrush>
                </c:RemoteBrush>
            </Button.Background>
        </Button>
    </Grid>
</Window>