Silverlight font color and gradient

XAML

<UserControl x:Class="SilverlightGradient.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Grid x:Name="LayoutRoot" Background="BlanchedAlmond">

        <TextBlock
             FontFamily="Comic Sans MS"
             FontSize="40"
             FontStyle="Italic"
             FontWeight="Bold"
             Foreground="DarkTurquoise"
            Margin="30">
            Zango!
        </TextBlock>
        
        <TextBlock
             FontFamily="Verdana"
             FontSize="75"
             FontWeight="Bold"
             Margin="130">
            Zingo!
            <TextBlock.Foreground>
                <LinearGradientBrush StartPoint="0, 0" EndPoint="1, 1">
                    <GradientStop Color="DeepSkyBlue" Offset="0.25"></GradientStop>
                    <GradientStop Color="Red" Offset="0.5"></GradientStop>
                    <GradientStop Color="Green" Offset="0.75"></GradientStop>
                </LinearGradientBrush>
            </TextBlock.Foreground>
             
        </TextBlock>
                              
    </Grid>
</UserControl>