WPF在MouseOver上更改路径填充

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="WPF MouseOver Example" Height="450" Width="800">
    <Grid>
        <Path x:Name="myPath" Fill="Blue" Stroke="Black" StrokeThickness="2">
            <Path.Data>
                <PathGeometry>
                    <PathFigure StartPoint="0,0">
                        <LineSegment Point="100,0"/>
                        <LineSegment Point="100,100"/>
                        <LineSegment Point="0,100"/>
                    </PathFigure>
                </PathGeometry>
            </Path.Data>
            <Path.Style>
                <Style TargetType="Path">
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Fill" Value="Red"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Path.Style>
        </Path>
    </Grid>
</Window>