双缓冲

new Thread(delegate()
            {
                Action 双缓冲 = delegate()
                {
                    SetStyle(ControlStyles.UserPaint, true);
                    SetStyle(ControlStyles.AllPaintingInWmPaint, true);//禁止擦除背景.
                    SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
                    this.BeginInvoke(new Action(() => this.UpdateStyles()));
                }; 双缓冲();
            }).Start();