{

public SetCustomerBillingAgreement()

{

}

public string SetCustomerBillingAgreementCode(string returnURL,string cancelURL,string billingDesc)

{

NVPCallerServices caller = new NVPCallerServices();

IAPIProfile profile = ProfileFactory.createSignatureAPIProfile();

/*

WARNING: Do not embed plaintext credentials in your application code.

Doing so is insecure and against best practices.

Your API credentials must be handled securely. Please consider

encrypting them for use in any production environment, and ensure

that only authorized individuals may view or modify them.

*/

// Set up your API credentials, PayPal end point, API operation and version.

profile.APIUsername = "sdk-three_api1.sdk.com";

profile.APIPassword = "QFZCWN5HZM8VBG7Q";

profile.APISignature = "AVGidzoSQiGWu.lGj3z15HLczXaaAcK6imHawrjefqgclVwBe8imgCHZ";

profile.Environment="sandbox";

caller.APIProfile = profile;

NVPCodec encoder = new NVPCodec();

encoder["VERSION"] = "51.0";

encoder["METHOD"] = "SetCustomerBillingAgreement";

// Add request-specific fields to the request.

encoder["RETURNURL"] = returnURL;

encoder["CANCELURL"] = cancelURL;

encoder["BILLINGTYPE"] = "RecurringPayments";

encoder["BILLINGAGREEMENTDESCRIPTION"] = billingDesc;

// Execute the API operation and obtain the response.

string pStrrequestforNvp= encoder.Encode();

string pStresponsenvp=caller.Call(pStrrequestforNvp);

NVPCodec decoder = new NVPCodec();

decoder.Decode(pStresponsenvp);

return decoder["ACK"];

}