Xamarin for Visual Studio 2015 does not have corresponding libraries

I installed Xamarin for Visual Studio 2015 because the 2017 version has issues. When I start a new blank app, it only loads with

using Android.App;
using Android.Widget;
using Android.OS;

      

        
        
        
      

    

My problem is that the program compiles and links correctly with the Android emulator and some functions exist, but when I try to use any call (Resource.Id) the Id call does not exist. There is no definition for Id in my Resource class, but this is widely used in all demos and tutorials. Likewise, I cannot use Android: crs = "" as crs is not defined either.

I suspect it is the library references which are the problem, but I cannot find what the problem is.

I am also concerned that my library Mono.Android

is at version 0.0.0.0

Any advice would be great