private static void RunTransformation(object parameters)
        {
            Form frm = (Form)((object[])parameters)[0];
            if (frm.InvokeRequired)
            {
                RunTransformationDelegate del = new RunTransformationDelegate(RunTransformation);
                frm.Invoke(del, parameters);
            }
            else
            {
                //动画的变量参数
                double FPS = 300.0;
                long interval = (long)(Stopwatch.Frequency / FPS);
                long ticks1 = 0;
                long ticks2 = 0;

//传进来的新的窗体的大小
                Size size = (Size)((object[])parameters)[1];

int xDiff = Math.Abs(frm.Width - size.Width);
                int yDiff = Math.Abs(frm.Height - size.Height);

int step = 10;

int xDirection = frm.Width < size.Width ? 1 : -1;
                int yDirection = frm.Height < size.Height ? 1 : -1;

int xStep = step * xDirection;
                int yStep = step * yDirection;

//要调整的窗体的宽度是否在步长之内
                bool widthOff = IsWidthOff(frm.Width, size.Width, xStep);
                //要调整的窗体的高度是否在步长之内
                bool heightOff = IsHeightOff(frm.Height, size.Height, yStep);

while (widthOff || heightOff)
                {
                    //获取当前的时间戳
                    ticks2 = Stopwatch.GetTimestamp();
                    //允许调整大小仅在有足够的时间来刷新窗体的时候
                    if (ticks2 >= ticks1 + interval) 
                    {
                        //调整窗体的大小
                        if (widthOff)
                            frm.Width += xStep;

if (heightOff)
                            frm.Height += yStep;

widthOff = IsWidthOff(frm.Width, size.Width, xStep);
                        heightOff = IsHeightOff(frm.Height, size.Height, yStep);

//允许窗体刷新
                        Application.DoEvents();

//保存当前的时间戳
                        ticks1 = Stopwatch.GetTimestamp();
                    }

Thread.Sleep(1);
                }

}
        }

private static bool IsWidthOff(int currentWidth, int targetWidth, int step)
        {
            //目标宽度与当前宽度是否在步长之内，如果是，返回false
            if (Math.Abs(currentWidth - targetWidth) <= Math.Abs(step)) return false;

return (step > 0 && currentWidth < targetWidth) ||
                   (step < 0 && currentWidth > targetWidth); 
        }