水平交错效果显示图像

        private void button1_Click(object sender, EventArgs e)
        {
            int intWidth = this.BackgroundImage.Width;
            int intHeight = this.BackgroundImage.Height;
            Graphics myGraphics = this.CreateGraphics();
            Bitmap myBitmap=(Bitmap)this.BackgroundImage.Clone();
            Bitmap bitmap = new Bitmap(intWidth,intHeight);
            myGraphics.Clear(Color.WhiteSmoke);
            int i=0;
            while(i<=intWidth/2)
            {
                for (int m = 0; m <= intHeight-1; m++)
                {
                    bitmap.SetPixel(i,m,myBitmap.GetPixel(i,m));
                }
                for (int m = 0; m <=intHeight-1; m++)
                {
                    bitmap.SetPixel(intWidth - i-1, m, myBitmap.GetPixel(intWidth - i-1, m));
                }
                i++;
                this.Refresh();
                this.BackgroundImage = bitmap;
                System.Threading.Thread.Sleep(10);
            }
        }