具有半透明网格的DropShadowEffect

<Window x:Class="DropShadowGridExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.Background>
            <DrawingBrush>
                <DrawingBrush.Drawing>
                    <DrawingGroup>
                        <GeometryDrawing Brush="Gray" Geometry="M0,0 L1,0 1,1 0,1Z" />
                        <GeometryDrawing Brush="Gray" Geometry="M0,0 L0,1 1,1 1,0Z" />
                        <GeometryDrawing Brush="Gray" Geometry="M0,0 L1,1 M0,1 L1,0" />
                    </DrawingGroup>
                </DrawingBrush.Drawing>
            </DrawingBrush>
        </Grid.Background>
        <Border BorderBrush="Black" BorderThickness="1" CornerRadius="5" Margin="50">
            <Border.Effect>
                <DropShadowEffect BlurRadius="10" Color="Black" Direction="315" Opacity="0.5" ShadowDepth="5" />
            </Border.Effect>
            <TextBlock Text="Hello, World!" FontSize="24" HorizontalAlignment="Center" VerticalAlignment="Center" />
        </Border>
    </Grid>
</Window>