I have a DLL I've compiled in VB on VS.2013. The DLL is called IPadTest and contains a single public class, DtaProject, with two public methods, Load and Save.
I copied this over to my Mac and opened it in Xamarin, where it appeared and imported into a test solution just fine.
I then went to the sample code's WillEnterForeground and entered...
Xamarin is happy with the IPadTest.DtaProject part, but when you type the next period all you get is Equals and ReferenceEquals. None of my methods appear.