如何使WPF资源样式在运行时可切换？

public void LoadResourceDictionary(string resourceName)
{
    var dict = new ResourceDictionary();
    dict.Source = new Uri(resourceName, UriKind.Relative);
    Application.Current.Resources.MergedDictionaries.Add(dict);
}

private void SwitchThemeButton_Click(object sender, RoutedEventArgs e)
{
    // 切换样式
    if (Application.Current.Resources.MergedDictionaries.Count > 0)
    {
        Application.Current.Resources.MergedDictionaries.RemoveAt(0);
    }

    // 根据需要加载不同的样式文件
    if (isStyle1)
    {
        LoadResourceDictionary("Style2.xaml");
        isStyle1 = false;
    }
    else
    {
        LoadResourceDictionary("Style1.xaml");
        isStyle1 = true;
    }
}