[ImageList il = new ImageList();
   il.ColorDepth = ColorDepth.Depth32Bit;
   il.TransparentColor = Color.Transparent;
   il.ImageSize = new Size(78, 80);

// here i am getting an error
   il.Images.Add(Image.FromStream(new MemoryStream((byte[]) dataReader["image"])));

                    //  il.Images.Add(Image.FromFile(img_directory + dataReader["image"]));


                    b.Image = il.Images[0];
                    b.Margin = new Padding(3, 3, 3, 3);][1]