c# - C#でマウスを使って線を引く方法

Question

私は現在、ペイントのようにマウスを使用して線を描くビジュアルスタジオWPF形式のプログラムを作成しようとしています。現在、同じ古い線を描画し続けていますが、マウスの左ボタンを押すたびに新しい線を描画したいと考えています。MainWindows.xaml.csコードとその外観は次のとおりです。

namespace DrawingLines
{

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private PathFigure _pathFigure = new PathFigure();
    PathFigureCollection _pathCollection = new PathFigureCollection();
    PathSegmentCollection _segments = new PathSegmentCollection();
    private PathGeometry _pathGeometry = new PathGeometry();

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        _pathFigure.Segments = _segments;
        _pathCollection.Add(_pathFigure);
        _pathGeometry.Figures = _pathCollection;
        myPath.Data = _pathGeometry;
    }

    private void Window_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.LeftButton == MouseButtonState.Pressed)
        {
            LineSegment segment = new LineSegment();
            segment.Point = e.GetPosition(this);
            _pathFigure.Segments.Add(segment);
        }

    }

    private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        _pathFigure.StartPoint = e.GetPosition(this);
    }

    //private void Window_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
    //{

    //}

    private void button1_Click(object sender, RoutedEventArgs e)
    {
        this.Close();

    }
}

}

MainWindow.xmalコードは次のとおりです。

<Window x:Class="DrawingLines.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Joonistamine" Height="350" Width="525" Loaded="Window_Loaded" MouseMove="Window_MouseMove" MouseLeftButtonDown="Window_MouseLeftButtonDown" MouseRightButtonDown="Window_MouseRightButtonDown">
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="53*" />
        <RowDefinition Height="258*" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="124*" />
        <ColumnDefinition Width="379*" />
    </Grid.ColumnDefinitions>
    <Path Stroke="Black" StrokeThickness="1" Name="myPath" Grid.ColumnSpan="2" Grid.RowSpan="2" />
    <Button Content="Exit" Height="25" HorizontalAlignment="Left" Name="button1" VerticalAlignment="Top" Width="46" Click="button1_Click" BorderBrush="Red" Foreground="#FFFF1A1A" />
</Grid>

私は何を間違っていますか？