加密：

/// <summary>
        /// 加密
        /// </summary>
        /// <param name="content">要加密的串</param>
        /// <param name="aesKey">金鑰</param>
        /// <returns></returns>
        public static string AesEncryptECB(string content, string aesKey)
        {
            
 
byte[] byteKEY = Encoding.UTF8.GetBytes(aesKey);

            byte[] byteContnet = Encoding.UTF8.GetBytes(content);

            var _aes = new RijndaelManaged();
            _aes.Padding = PaddingMode.PKCS7;
            _aes.Mode = CipherMode.ECB;
            _aes.Key = byteKEY;

            var _crypto = _aes.CreateEncryptor();
            
 
byte[] decrypted = _crypto.TransformFinalBlock(byteContnet, 0, byteContnet.Length);

            _crypto.Dispose();

            return Convert.ToBase64String(decrypted);
        }

解密：

/// <summary>
        /// 解密
        /// </summary>
        /// <param name="decryptStr">要解密的串</param>
        ///
 
 <param name="aesKey">金鑰</param>        
        /// <returns></returns>
        public static string AesDecryptECB(string decryptStr, string aesKey)
        {
            byte[] byteKEY = Encoding.UTF8.GetBytes(aesKey);
            byte[] byteDecrypt = System.Convert.FromBase64String(decryptStr);

            var _aes = new RijndaelManaged();
            _aes.Padding = PaddingMode.PKCS7;
            _aes.Mode = CipherMode.ECB;
            _aes.Key = byteKEY;

            var _crypto = _aes.CreateDecryptor();
            byte[] decrypted = _crypto.TransformFinalBlock(byteDecrypt, 0, byteDecrypt.Length);

            _crypto.Dispose();

            return Encoding.UTF8.GetString(decrypted);
        }

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