public static string DecodeWithAES(byte[] ticket, byte[] aes)
        {
            var iv = aes.Take(16).ToArray();

            string text;

            var aesAlg = NewRijndaelManaged(aes);
            var decryptor = aesAlg.CreateDecryptor(aes, iv);

            using (var msDecrypt = new MemoryStream(ticket))
            {
                using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                {
                    using (var srDecrypt = new StreamReader(csDecrypt))
                    {
                        text = srDecrypt.ReadToEnd();
                    }
                }
            }
            return text;
        }
        private static Aes NewRijndaelManaged(byte[] key)
        {

            var aesAlg = Aes.Create();
            aesAlg.Key = key;
            aesAlg.IV = key.Take(16).ToArray();

            return aesAlg;
        }