Upgrading Xamarin Forms to .Net Standard 2

Question

I am attempting to convert my Xamarin project to use .net Standard 2.

• I have added the .net standard 2 library
• I have installed all the nuget packages that previously existed in my pcl library. (all build fine)
• Then I removed the pcl and added the std library

However when I build I get a few compile time exceptions:

• Could not load assembly 'IdentityModel, Version=1.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?
• Could not load assembly 'XLabs.Forms, Version=2.0.5782.12218, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?

Those ddl indeed does not exist in the Android bin folder. If I copy the dlls in manually the build error goes away.

I am not that familiar with the new .net standard stuff to know if these libraries are maybe not being copied over because of incompatibilities.

How do I fix this?

EDIT: The nuget packages above is only added to the common std and pcl library not the Android 1. This worked with the pcl version so I assumed similar behavior with the std version. I had to install it into the android version to make it work. Why was necessary in the std and not the pcl?

Flori

Answer 1

You need to add the following NuGet packages to your Xamarin.Android project:

• IdentityModel v1.0.0.0

• XLabs.Forms v2.0.5782

I'm not sure why the PCL implementation worked without these packages in your Xamarin.Android project. Likely, the package creators are using Bait and Switch with the netstandard implementation.

Bertrando