Question

I am using paypal NVP and NVP respond in key value pair string

Example

TOKEN=EC-3XXXXXXXXXXX154J&BILLINGAGREEMENTACCEPTEDSTATUS=1&CHECKOUTSTATUS=PaymentActionNotInitiated&TIMESTAMP=2012-07-10T11:45:59Z&CORRELATIONID=ecf9bfe9b1168&ACK=Success&VERSION=64.0&BUILD=3242673&EMAIL=[e-mail]&PAYERID=3V85HKW32SXKG&PAYERSTATUS=verified&FIRSTNAME=Govind&LASTNAME=Malviya&COUNTRYCODE=US&SHIPTONAME=Govind
Malviya&SHIPTOSTREET=1 Main St&SHIPTOCITY=San
Jose&SHIPTOSTATE=CA&SHIPTOZIP=95131&SHIPTOCOUNTRYCODE=US&SHIPTOCOUNTRYNAME=United
States&ADDRESSSTATUS=Confirmed&CURRENCYCODE=USD&AMT=30.90&SHIPPINGAMT=0.00&HANDLINGAMT=0.00&TAXAMT=0.00&DESC=test EC
payment&INSURANCEAMT=0.00&SHIPDISCAMT=0.00&PAYMENTREQUEST_0_CURRENCYCODE=USD&PAYMENTREQUEST_0_AMT=30.90&PAYMENTREQUEST_0_SHIPPINGAMT=0.00&PAYMENTREQUEST_0_HANDLINGAMT=0.00&PAYMENTREQUEST_0_TAXAMT=0.00&PAYMENTREQUEST_0_DESC=test
EC
payment&PAYMENTREQUEST_0_INSURANCEAMT=0.00&PAYMENTREQUEST_0_SHIPDISCAMT=0.00&PAYMENTREQUEST_0_INSURANCEOPTIONOFFERED=false&PAYMENTREQUEST_0_SHIPTONAME=Govind
Malviya&PAYMENTREQUEST_0_SHIPTOSTREET=1 Main
St&PAYMENTREQUEST_0_SHIPTOCITY=San
Jose&PAYMENTREQUEST_0_SHIPTOSTATE=CA&PAYMENTREQUEST_0_SHIPTOZIP=95131&PAYMENTREQUEST_0_SHIPTOCOUNTRYCODE=US&PAYMENTREQUEST_0_SHIPTOCOUNTRYNAME=United
States&PAYMENTREQUESTINFO_0_ERRORCODE=0

I want to desrialize it in strongly typed data, like JavaScriptSerializer do for json string. Please don’t provide solution using dictionary i want to avoid magic string, I can add attribute on each property.

My class is

 public class GetExpressCheckoutDetailsResponse : IPaypalResponse
    {
        public string Token { get; set; }
        public string BillingAgreementAcceptedStatus { get; set; }
        public string CheckoutStatus { get; set; }
        public string Timestamp { get; set; }
        public string CorrelationID { get; set; }
        public Status Acknowledgement { get; set; }
        public string Version { get; set; }
        public string Build { get; set; }
        public string Email { get; set; }
        public string PayerID { get; set; }
        public string PayerStatus { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string CountryCode { get; set; }
        public string ShiptoName { get; set; }
        public string ShiptoStreet { get; set; }
        public string ShipToCity { get; set; }
        public string ShipToState { get; set; }
        public string ShipToZip { get; set; }
        public string ShipToCountryCode { get; set; }
        public string ShipToCountryName { get; set; }
        public string AddressStatus { get; set; }
        public string CurrencyCode { get; set; }
        public string Amount { get; set; }
        public string ShippingAmount { get; set; }
        public string HandlingAmount { get; set; }
        public string TaxAmount { get; set; }
        public string Description { get; set; }
        public string InsuranceAmount { get; set; }
        public string ShipdiscAmount { get; set; }
        public string PaymentRequestCurrencycode { get; set; }
        public string PaymentRequestAmount { get; set; }
        public string PaymentRequestShippingAmount { get; set; }
        public string PaymentRequestHandlingAmount { get; set; }
        public string PaymentRequestTaxAmount { get; set; }
        public string PaymentRequestDescription { get; set; }
        public string PaymentRequestInsuranceAmount { get; set; }
        public string PaymentRequestShipdiscAmount { get; set; }
        public string PaymentRequestInsuranceOptionOffered { get; set; }
        public string PaymentRequestShipToName { get; set; }
        public string PaymentRequestShipToStreet { get; set; }
        public string PaymentRequestShipToCity { get; set; }
        public string PaymentRequestShipToState { get; set; }
        public string PaymentRequestShipToZip { get; set; }
        public string PaymentRequestShipToCountryCode { get; set; }
        public string PaymentRequestShipToCountryName { get; set; }
        public string PaymentRequestInfoErrorCode { get; set; }
    }

Answer 1

You can use HttpUtility.ParseQueryString to convert your string to NameValueCollection. The rest is just reflection

string responseString = "TOKEN=EC......";
var dict = HttpUtility.ParseQueryString(responseString);
GetExpressCheckoutDetailsResponse respObj = new GetExpressCheckoutDetailsResponse();
foreach (var p in respObj.GetType().GetProperties())
{
    p.SetValue(respObj, dict[p.Name]);
}

//respObj is ready to use