How to encrypt a picture so that it appears confused?

//This code was used by an algorithm DES 

pictureBox1.Image = image;
           MemoryStream ms = new MemoryStream();
           image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

           byte[] bytes = ms.ToArray();
           BitArray bitArray = new BitArray(bytes);
           for (var x = 5000; x < 9000; x++)
               textBox1.Text += Convert.ToInt16(bitArray[x]);
           MD5CryptoServiceProvider mds = new MD5CryptoServiceProvider();
           //UTF8Encoding utf8 = new UTF8Encoding();
           TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
           //tdes.Key = mds.ComputeHash(utf8.GetBytes(textBox1.Text));
           tdes.Mode = CipherMode.CBC;
           tdes.Padding = PaddingMode.PKCS7;
           ICryptoTransform tram = tdes.CreateEncryptor();
           encrypted = (tram.TransformFinalBlock(bytes, 0, (bytes.Length)));
           //MessageBox.Show(Convert.ToString(encrypted));
           File.WriteAllBytes("E:/u.jpg", encrypted);