微信支付运营工具商家转账功能接口/v3/fund-app/mch-transfer/transfer-bills对接，Wechatpay-Serial 使用RSA方式从平台证书中提取公钥对平台证书的序列号进行加密，提示：{"code":"PARAM_ERROR","message":"平台证书序列号Wechatpay-Serial错误"} ，按照常见问题：https://pay.weixin.qq.com/doc/v3/merchant/4013053279 确认了，都没有问题，还是一直显示那个错误！ 下面代码是加密方法：、 public static string EncryptWithPlatformCertificate(string plainText, string platformCertificatePath)         { try             {                 string certificateText = File.ReadAllText(platformCertificatePath);                 certificateText = certificateText.Replace("-----BEGIN CERTIFICATE-----", "").                     Replace("-----END CERTIFICATE-----", "").                     Replace("\n", "").                     Replace("\r", "");                 byte[] certificateBytes = Convert.FromBase64String(certificateText);                 X509Certificate2 certificate = new X509Certificate2(certificateBytes);                 RSACryptoServiceProvider rsa = (RSACryptoServiceProvider)certificate.PublicKey.Key;                 byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);                 byte[] encryptedBytes = rsa.Encrypt(plainTextBytes, true);                 return Convert.ToBase64String(encryptedBytes);             }             catch (Exception ex)             {                 throw new Exception("加密失败: " + ex.Message);             }         }