WPF前端XAML页面实现灰白相间马赛克背景效果

这是别人写的一个WPF前端实现灰白马赛克的背景效果，一行后端代码都不需要即可实现简单干净，用来做类似ps的图片编辑器背景板效果应该挺好的 这里做下记录

<ScrollViewer.Background>
         <DrawingBrush TileMode="Tile" Stretch="Uniform" ViewportUnits="Absolute" Viewport="0,0,20,20">
                                        <DrawingBrush.Drawing>
                                            <DrawingGroup>
                                                <DrawingGroup.Children>
                                                    <GeometryDrawing Brush="White">
                                                        <GeometryDrawing.Geometry>
                                                            <RectangleGeometry Rect="0,0,10,10"/>
                                                        </GeometryDrawing.Geometry>
                                                    </GeometryDrawing>
                                                    <GeometryDrawing Brush="#FFBFBFBF">
                                                        <GeometryDrawing.Geometry>
                                                            <RectangleGeometry Rect="0,0,5,5"/>
                                                        </GeometryDrawing.Geometry>
                                                    </GeometryDrawing>
                                                    <GeometryDrawing Brush="#FFBFBFBF">
                                                        <GeometryDrawing.Geometry>