WPF 2D Geometry Group

 

<Window x:Class="WpfApplication16.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Geometry Group" Height="350" Width="330">
<Window.Resources>
<SolidColorBrush x:Key="MyGrayGridBrush" Color="YellowGreen"/>
<GeometryGroup x:Key="GeometryNonzero"  
            FillRule="Nonzero">
<EllipseGeometry RadiusX="50" RadiusY="50" 
                    Center="65,60"/>
<EllipseGeometry RadiusX="30" RadiusY="30"  
                    Center="65,60"/>
</GeometryGroup>
<GeometryGroup x:Key="GeometryEvenOdd"  
            FillRule="EvenOdd">
<EllipseGeometry RadiusX="50" RadiusY="50" 
                    Center="65,60"/>
<EllipseGeometry RadiusX="30" RadiusY="30" 
                    Center="65,60"/>
</GeometryGroup>
</Window.Resources>
<Border Margin="5" BorderBrush="Black" BorderThickness="1"  
Background="{StaticResource MyGrayGridBrush}" 
HorizontalAlignment="Left">
<Canvas Height="310" Width="300">
<Grid ShowGridLines="True" Height="265">
	<Grid.ColumnDefinitions>
		<ColumnDefinition Width="140"/>
		<ColumnDefinition Width="140"/>
	</Grid.ColumnDefinitions>
 
	<StackPanel Margin="5" Grid.Column="0">
		<TextBlock Text="FileRule = Nonzero" 
                    Margin="15,5,5,5"/>
		<Path Fill="LightBlue" Stroke="Blue"  
                StrokeThickness="2" 
        Data="{StaticResource GeometryNonzero}"/>
		<Path Fill="LightCoral" Stroke="Red" 
                StrokeThickness="2" Canvas.Left="150" 
        Data="{StaticResource GeometryNonzero}"/>
	</StackPanel>
 
	<StackPanel Margin="5" Grid.Column="1">
		<TextBlock Text="FileRule = EvenOdd" 
                    Margin="15,5,5,5"/>
		<Path Fill="LightBlue" Stroke="Blue" 
                StrokeThickness="2" 
            Data="{StaticResource GeometryEvenOdd}"/>
		<Path Fill="LightCoral" Stroke="Red" 
                StrokeThickness="2"  
                Canvas.Left="150"  
            Data="{StaticResource GeometryEvenOdd}"/>
	</StackPanel>
</Grid>
</Canvas>
</Border>
</Window>

reference : Practical WPF Graphics Programming