c# – 我如何获得屏幕方向？

public UIManager(int screenIndeX)
    {
        this.ScreenIndex = screenIndex;            

        try
        {
            Screen[] all_screens;
            all_screens = Screen.AllScreens;

            if (all_screens.Length >= ScreenIndeX)
            {
                this.customer_form.Left = all_screens[this.ScreenIndex].bounds.Width;
                this.customer_form.Top = all_screens[this.ScreenIndex].bounds.Height;                    
                this.customer_form.Show();
            }
        }
        catch
        {
            //Do nothing
        }
    }