给WPF文字加多条修饰线

这是上篇WPF中的文字修饰——上划线，中划线，基线与下划线 最后留给朋友思考的问题。

效果图：

XAML代码：
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<Canvas>
<TextBlock FontSize="84" FontFamily="Arial Black" Margin="0,0">
<TextBlock.TextDecorations>
<TextDecoration PenOffset="10" PenOffsetUnit="Pixel" PenThicknessUnit="Pixel">
 <TextDecoration.Pen>
          <Pen Thickness="5">
            <Pen.Brush>
              <LinearGradientBrush Opacity="0.5"
                StartPoint="0,0.5"  EndPoint="1,0.5">
                <LinearGradientBrush.GradientStops>
                  <GradientStop Color="Yellow" Offset="0" />
                  <GradientStop Color="Red" Offset="1" />
                </LinearGradientBrush.GradientStops>
              </LinearGradientBrush>
            </Pen.Brush>
          </Pen>
        </TextDecoration.Pen>
</TextDecoration>
<TextDecoration PenOffset="2" PenOffsetUnit="Pixel" PenThicknessUnit="Pixel">
 <TextDecoration.Pen>
          <Pen Thickness="1">
            <Pen.Brush>
              <SolidColorBrush Opacity="0.5" Color="Red"/>
            </Pen.Brush>
          </Pen>
        </TextDecoration.Pen>
</TextDecoration>
</TextBlock.TextDecorations>
GOOD
</TextBlock>
</Canvas>
</Page>
（其实就是使用多个TextDecoration而已！）