<Window x:Class="WpfApp56.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
WindowState="Maximized"
WindowStyle="None"
xmlns:local="clr-namespace:WpfApp56"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800" Background="Transparent">
<Border BorderBrush="Transparent" BorderThickness="5"
HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10">
<Image Stretch="None" HorizontalAlignment="Left">
<Image.Source>
<DrawingImage PresentationTraceSources.TraceLevel="High">
<DrawingImage.Drawing>
<GeometryDrawing>
<GeometryDrawing.Geometry>
<GeometryGroup>
<EllipseGeometry Center="0,0" RadiusX="750" RadiusY="200"/>
<EllipseGeometry Center="0,0" RadiusX="300" RadiusY="450"/>
</GeometryGroup>
</GeometryDrawing.Geometry>
<GeometryDrawing.Brush>
<LinearGradientBrush>
<GradientStop Offset="0.0" Color="Blue"/>
<GradientStop Offset="1.0" Color="Red"/>
</LinearGradientBrush>
</GeometryDrawing.Brush>
<GeometryDrawing.Pen>
<Pen Thickness="10" Brush="Yellow"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
</DrawingImage.Drawing>
</DrawingImage>
</Image.Source>
</Image>
</Border>
</Window>
标签：Geometry,Image,GeometryGroup,Pen,GeometryDrawing,DrawingImage From： https://www.cnblogs.com/Fred1987/p/18592688