I am looking at a Xamarin tut. on Microsoft (and have looked at others last year) and they start with creating a new project > Cross-Platform > Class Library (Xamarin.Forms) using VS2015. They get at least 2 projects .Droid and .iOS. I do not get them. I have Googled and have come across all sorts of info about needing .net standard and how-tos etc. I do not want to get bogged down in this as I simply want to follow a course.