Consuming SOAP web service in Xamarin Forms Portable Class Library (PCL)

Question

I've made a web service in the ASMX format which I'm trying to consume in my Xamarin.Forms project. By default I cannot right-click "references" and click "Add Web Reference", it's just not there. However after I manually add System.Web.Services it appears. However when I try to add the web service I get an error "The method or operation is not implemented":

Can anyone help me? Thanks.

Edit: Profile in the project:

Answer 1

Add Service Reference as shown in the picture. To get that option unload the PCL project, edit it. Find Profile259 and change it to Profile78