WinForm 窗口出现在靠屏幕左边中间或者右边中间

            //设置窗体在屏幕左下角显示            int x = Screen.PrimaryScreen.WorkingArea.Left;            int y = 120;            this.Location = new Point(x, y);

            //窗口在右下角显示            int x = Screen.PrimaryScreen.WorkingArea.Right - this.Width;            int y = 120;            this.Location = new Point(x, y);