Convert Bitmap To/From String

        public static string BitmapToString(Image bitmap)
        {
            byte[] bytes;
            using (var stream = new MemoryStream())
            {
                bitmap.Save(stream, ImageFormat.Png);
                bytes = stream.ToArray();
            }
            return Convert.ToBase64String(bytes);
        }

        public static Image StringToBitmap(string base64String)
        {
            Image bitmap;
            var buffer = Convert.FromBase64String(base64String);
            using (var stream = new MemoryStream(buffer))
            {
                stream.Position = 0;
                bitmap = Image.FromStream(stream);
            }
            return bitmap;
        }