C#中如何获得屏幕的宽高

System.Windows.Forms.Screen.GetWorkingArea(this);
            int width = ScreenArea.Width;//屏幕宽度
            int height = ScreenArea.Height;//屏幕高度
            this.Location = new System.Drawing.Point(width - this.Width, height - this.Height);//指定窗体显示在右下角