如何在canvas wpf中选择对象

Canvas canvas = new Canvas();

Rectangle rectangle = new Rectangle();
rectangle.Width = 100;
rectangle.Height = 50;
rectangle.Fill = Brushes.Blue;

canvas.Children.Add(rectangle);

canvas.MouseDown += Canvas_MouseDown;

private void Canvas_MouseDown(object sender, MouseButtonEventArgs e)
{
    Point mousePosition = e.GetPosition(canvas);

    // 遍历Canvas中的所有子元素
    foreach (UIElement element in canvas.Children)
    {
        if (element is Rectangle)
        {
            Rectangle rect = (Rectangle)element;

            // 判断鼠标点击位置是否在矩形内部
            if (rect.IsMouseOver)
            {
                // 选中矩形，可以进行后续操作
                rect.Fill = Brushes.Red;
            }
            else
            {
                // 未选中的矩形恢复原来的颜色
                rect.Fill = Brushes.Blue;
            }
        }
    }
}