Image img = Image.FromHbitmap(icon.ToBitmap().GetHbitmap());

                            Graphics g = Graphics.FromImage(img);

                            g.DrawImage(img, , , img.Width, img.Height);

                            Font f = new Font("Verdana", );

                            Brush b = new SolidBrush(Color.Red);

                            g.DrawString("!!!", f, b,, );

Icon  icon = Icon.FromHandle(((Bitmap)img).GetHicon());

                            g.Dispose();