System.Drawing.Image image = SetByteToImage(img);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
g.DrawImage(image, 0, 0, image.Width, image.Height);
System.Drawing.Font f = new System.Drawing.Font("Verdana", 16);
System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Blue);
MemoryStream mm = new MemoryStream();
g.DrawString(addText, f, b, 15, 15);