[DllImport("gdi32.dll")]
private static extern bool BitBlt(
 IntPtr hdcDest, // handle to destination DC
        int nXDest, // x-coord of destination upper-left corner
        int nYDest, // y-coord of destination upper-left corner
        int nWidth, // width of destination rectangle
        int nHeight, // height of destination rectangle
        IntPtr hdcSrc, // handle to source DC
        int nXSrc, // x-coordinate of source upper-left corner
        int nYSrc, // y-coordinate of source upper-left corner
        System.Int32 dwRop // raster operation code
        );

        private void button2_Click(object sender, EventArgs e)
        {
            Graphics g1 = this.CreateGraphics();
            Image MyImage = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height, g1);
            Graphics g2 = Graphics.FromImage(MyImage);
            IntPtr dc1 = g1.GetHdc();
            IntPtr dc2 = g2.GetHdc();
            BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369376);
            g1.ReleaseHdc(dc1);
            g2.ReleaseHdc(dc2);
            MyImage.Save(@"c:\1.jpg", ImageFormat.Jpeg);
        }

方法很简单，首先被copy的类需要实现IClonable的接口，具体实现方法如下：

public object Clone()

    {

        MemoryStream ms = new MemoryStream();       

       BinaryFormatter bf = new BinaryFormatter();

        bf.Serialize(ms, this);

        ms.Position = 0;

        object obj = bf.Deserialize(ms);

        ms.Close();

        return obj;

    }

当然，需要引用System.Runtime.Serialization.Formatters.Binary namespace.

其实，如果有很多类需要实现deep copy的话，可以考虑用一个抽象类实现IClonable接口，其他的类继承这个抽象类就可以了。