Migrate to PackageReference Missing Nuget Build Failure

Question

I have a Xamarin Forms Project - the Android project targets API 28 (Pie) and uses packages.config for the nuget references. All of the packages have a targetFramework="monoandroid90". The project compiles and runs correctly.

I want to migrate to using PackageReference, so I use the Migrate packages.config to PackageReference option.

After this completes I try to build the project and receive an error regarding a missing package:

Xamarin.Android.Support.Annotations.28.0.0.1

Looking in the packages folder, I can see that none of the Xamarin.Android.Support packages have been downloaded and I can't get them to download - even by reinstalling the package.

I also noticed that the csproj file reference monoandroid81 for all the nugets, even though the packages.config used monoandroid90

Has anyone had a similar difficulty after migrating?

Try to make `clean rebuild` - delete all `obj` and `debug` directories, and rebuild your app. — Денис Чорный, Apr 10 '19 at 09:35
Thanks for the reply - I've already tried that, also deleted the packages folder - the project still won't build — markpirvine, Apr 10 '19 at 09:37
sorry, don't know else of how to solve the problem. If it is so bad, you can create new project with the last nuget updates, and ctrl+c ctrl+v your code, but that's really painfull :) — Денис Чорный, Apr 11 '19 at 07:57
That could be an option! I’ve had the same problem with another projects - maybe some other packages need updated - either way it’s not a big problem — markpirvine, Apr 11 '19 at 09:03

Migrate to PackageReference Missing Nuget Build Failure

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