<Path x:Name="PART_Path"
                            Stroke="Red"
                            StrokeThickness="10"
                            StrokeStartLineCap="Round"
                            StrokeEndLineCap="Round">
                            <Path.Data>
                                <PathGeometry>
                                    <PathFigure StartPoint="{Binding StartPoint}">
                                        <ArcSegment
                                            x:Name="PART_BackgroundArcSegment"
                                            IsLargeArc="True"
                                            SweepDirection="Clockwise"
                                            RotationAngle="{Binding RotationAngle}">
                                            Size="{Binding Size}">
                                        </ArcSegment>
                                    </PathFigure>
                                </PathGeometry>
                            </Path.Data>
                        </Path>