WPF创建带角的多边形？

<Window x:Class="PolygonExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Polygon Example" Height="450" Width="800">
    <Grid>
        <Path Stroke="Black" StrokeThickness="2" Fill="LightBlue">
            <Path.Data>
                <PathGeometry>
                    <PathGeometry.Figures>
                        <PathFigureCollection>
                            <PathFigure StartPoint="100,100">
                                <PathFigure.Segments>
                                    <PathSegmentCollection>
                                        <LineSegment Point="200,100" />
                                        <LineSegment Point="200,200" />
                                        <LineSegment Point="150,250" />
                                        <LineSegment Point="100,200" />
                                    </PathSegmentCollection>
                                </PathFigure.Segments>
                            </PathFigure>
                        </PathFigureCollection>
                    </PathGeometry.Figures>
                </PathGeometry>
            </Path.Data>
        </Path>
    </Grid>
</Window>