I just created a new solution in VS 2017: Xamarin.Forms Masterdetail with .NET standard. What I have installed:
SDKs for Android 4.4-8.1 (Kitkat to Oreo)
Nuget packages for .NET standard library, Xamarin.Forms (both up to date)
If I try to install support.v4 or v7 I immediately get a LOT of compatibility errors like:
Xamarin.Android.Support.v4 27.0.2 is not compatible with netstandard2.0
Xamarin.Android.Support.Design 27.0.2 is not compatible with +monoandroid70
I can't even update the nuget packages. What do?