获取当前系统连接的屏幕数量： Screen.AllScreens.Count();
获取当前屏幕的名称：string CurrentScreenName = Screen.FromControl(this).DeviceName;
获取当前屏幕对象：Screen CurrentScreen = Screen.FromControl(this);
获取当前鼠标所在的屏幕：Screen CurrentScreen = Screen.FromPoint(new Point(Cursor.Position.X, Cursor.Position.Y));

C#获取显示器屏幕数量 控制winform显示到哪一个屏幕