WPF:如何设置UserControl显示的对话框的所有者窗口？

<UserControl x:Class="WpfApp1.MyUserControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:WpfApp1"
             mc:Ignorable="d"
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
       <Button Content="打开对话框" Click="Button_Click"/>
    </Grid>
</UserControl>

using System.Windows;
using System.Windows.Controls;

namespace WpfApp1
{
    public partial class MyUserControl : UserControl
    {
        public MyUserControl()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            // 创建一个新的窗口
            Window dialog = new Window();

            // 将新窗口的所有者设置为当前UserControl所在的窗口
            dialog.Owner = Window.GetWindow(this);

            // 显示新窗口
            dialog.ShowDialog();
        }
    }
}