C# 三种实现抖屏的方式

     　　　　　//int a = -2;
             //this.BringToFront();
             //for (int i = 0; i < 20; i++)
             //{
             //    a = -a;
             //    this.Location = new Point(this.Location.X + 6 * a, this.Location.Y + 8 * a);

             //    Thread.Sleep(100);

             //}
             //2.
             //int X = this.Top; int Y = this.Left;

             //for (int i = 0; i < 100; i++)
             //{

             //    this.Top = this.Top + 10;

             //    this.Left = this.Left + 10;

             //    this.Top = this.Top - 10;

             //    this.Left = this.Left - 10;

             //}

             ////回到原来的位置

             //this.Top = X;
             //this.Left = Y;

             //3.
             Point pOld = this.Location;//原来的位置
             int radius = ;//半径
             for (int n = ; n < ; n++) //旋转圈数
             {
                 //右半圆逆时针
                 for (int i = -radius; i <= radius; i++)
                 {
                     int x = Convert.ToInt32(Math.Sqrt(radius * radius - i * i));

                     int y = -i;

                     this.Location = new Point(pOld.X + x, pOld.Y + y);

                     System.Threading.Thread.Sleep();

                 }

                 //左半圆逆时针
                 for (int j = radius; j >= -radius; j--)
                 {
                     int x = -Convert.ToInt32(Math.Sqrt(radius * radius - j * j));
                     int y = -j;
                     this.Location = new Point(pOld.X + x, pOld.Y + y);
                     System.Threading.Thread.Sleep();
                 }
             }

             this.Location = pOld;