TecDoc webservice returning xml data

[MitaGaves]

I have project about ecommerce using TecDoc webservice, already have access to database ID is *. I am very new in developing accessing web service. Whole link is http://webservicepilot.tecdoc.net/pegasus-2-0/?, link for web service is http://webservicepilot.tecdoc.net/pegasus-2-0/wsdl/TecdocToCat, I added to Visual studio this link via add reverence service. In the documetation that I downloaded from first link there is metgod getBrandForAssortment() but in the list of method in web service that I connected there are multiple of method like getBrandForAssortment() for example : BrandsForAssortmentRecord(), BrandsForAssortmentRequest(), BrandsForAssortmentRecordSeq() and BrandsForAssortmentResponse(). How to get data to visual studio gridview from such functions?Thank you for any help.