GeometryCombineMode = Union
<UniformGrid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Rows="2" Columns="2" TextBlock.FontSize="12pt"> <UniformGrid.Resources> <Style TargetType="{x:Type Path}"> <Setter Property="HorizontalAlignment" Value="Center" /> <Setter Property="VerticalAlignment" Value="Center" /> <Setter Property="Fill" Value="Blue" /> <Setter Property="Stroke" Value="Red" /> <Setter Property="StrokeThickness" Value="5" /> </Style> </UniformGrid.Resources> <Grid> <TextBlock HorizontalAlignment="Center"> GeometryCombineMode="Union" </TextBlock> <Path> <Path.Data> <CombinedGeometry GeometryCombineMode="Union"> <CombinedGeometry.Geometry1> <EllipseGeometry Center="96 96" RadiusX="96" RadiusY="96" /> </CombinedGeometry.Geometry1> <CombinedGeometry.Geometry2> <EllipseGeometry Center="48 48" RadiusX="96" RadiusY="96" /> </CombinedGeometry.Geometry2> </CombinedGeometry> </Path.Data> </Path> </Grid> </UniformGrid>