سلام

من توی چندین پروژه از کد زیر استفاده کردم ولی پروژه اخری مدام موقع اعتبارسنجی پرداخت ارور زیر رو میده:

System.ServiceModel.Dispatcher.NetDispatcherFaultException: 'The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter http://zarinpal.com/:PaymentVerificationResponse. The InnerException message was 'There was an error deserializing the object of type zarinpal.ServiceReference.PaymentVerificationResponseBody. The value '' cannot be parsed as the type 'Int64'.'.  Please see InnerException for more details.'