Using the "Add Web Reference" wizard on a PCL project generates a Reference.cs that does not compile.
This are the errors I get:
Error CS0234: The type or namespace name `IExtensibleDataObject' does not exist in the namespace `System.Runtime.Serialization'.
Error CS0234: The type or namespace name `ExtensionDataObject' does not exist in the namespace `System.Runtime.Serialization'.
The web service address used was http://api.dreamit.com.br/Handlers/ClienteEcommerce/Acoes.asmx
Xamarin Studio 5.10 and 6.0 both have the same problem on the Mac with Mono 4.4.1.
It is not specific to that particular web service since it is reproducible with other web services (e.g. http://www.w3schools.com/xml/tempconvert.asmx)
Interestingly it works fine on Windows with Xamarin Studio 5.10 and 6.0. On Windows the generated proxy class is different and does not use the IExtensibleDataObject nor the ExtensionDataObject. This possibly points to a Mono problem/change.
Created attachment 16501 [details]
Ran some tests with Xamarin Studio 5.9 and different versions of Mono. Used Xamarin Studio 5.9 since this supports Mono 4.0 whilst later versions of Xamarin Studio do not support it.
In Mono 4.0 the ExtensibleDataObject types are not used but in Mono 4.2 and above they are used.
Windows does not use ExtensibleDataObject however the generated proxy code is different to what Mono generates ignoring the ExtensibleDataObject problem.