C# (CSharp) PayPal.PayPalAPIInterfaceService.Model CreateBillingAgreementReq.toXMLString - 1 examples found. These are the top rated real world C# (CSharp) examples of PayPal.PayPalAPIInterfaceService.Model.CreateBillingAgreementReq.toXMLString extracted from open source projects. You can rate examples to help us improve the quality of examples.