/// <summary>

        /// AES加密

        /// </summary>

        /// <param name="encryptStr">明文</param>

        /// <param name="key">密钥</param>

        /// <returns></returns>

        public static string Encrypt(string encryptStr,string key)

        {

            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);

            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(encryptStr);

            RijndaelManaged rDel = new RijndaelManaged();

            rDel.Key = keyArray;

            rDel.Mode = CipherMode.ECB;

            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateEncryptor();

            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, , toEncryptArray.Length);

            return Convert.ToBase64String(resultArray, , resultArray.Length);

        }

        /// <summary>

        /// AES解密

        /// </summary>

        /// <param name="decryptStr">密文</param>

        /// <param name="key">密钥</param>

        /// <returns></returns>

        public static string Decrypt(string decryptStr,string key)

        {

            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);

            byte[] toEncryptArray = Convert.FromBase64String(decryptStr);

            RijndaelManaged rDel = new RijndaelManaged();

            rDel.Key = keyArray;

            rDel.Mode = CipherMode.ECB;

            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateDecryptor();

            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, , toEncryptArray.Length);

            return UTF8Encoding.UTF8.GetString(resultArray);

        }