byte[] encryptedData = Convert.FromBase64String(edata);  // strToToHexByte(text);                 RijndaelManaged rijndaelCipher = new RijndaelManaged();                 rijndaelCipher.Key = Convert.FromBase64String(aesKey); // Encoding.UTF8.GetBytes(AesKey);                 rijndaelCipher.IV = Convert.FromBase64String(iv);// Encoding.UTF8.GetBytes(AesIV);                 rijndaelCipher.Mode = CipherMode.CBC;                 rijndaelCipher.Padding = PaddingMode.PKCS7;                 ICryptoTransform transform = rijndaelCipher.CreateDecryptor();                 byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);                 var result = Encoding.UTF8.GetString(plainText); 代码如上  解密出现 填充无效，无法被移除。 解密用户手机号没有问题