winfrom 全屏自适应屏幕分辨率

Rectangle rect = new Rectangle();
rect = Screen.GetWorkingArea(this);
  
this.Width = rect.Width;//屏幕宽
this.Height = rect.Height;//屏幕高
this.ControlBox = false;   // 设置不出现关闭按钮
this.FormBorderStyle = FormBorderStyle.None;//无边框