Annotations are lost with Microsoft.NETCore.App.Ref 3.1.0

[jnm2]

string.IsNullOrEmpty no longer gets annotated when switching from 3.0.0 to 3.1.0.

  <PropertyGroup>
    <AnnotatedReferenceAssemblyVersion>3.1.0</AnnotatedReferenceAssemblyVersion>
  </PropertyGroup>
  <ItemGroup Condition="'$(TargetFramework)' != 'netcoreapp3.0' and '$(MSBuildProjectExtension)' == '.csproj'">
    <PackageReference Include="TunnelVisionLabs.ReferenceAssemblyAnnotator" Version="1.0.0-alpha.97" PrivateAssets="all" />
    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[$(AnnotatedReferenceAssemblyVersion)]" />
  </ItemGroup>

[jnm2]

Skipping target "AnnotateReferenceAssemblies" because it has no outputs.

[jnm2]

The fix is to change netcoreapp3.0 to netcoreapp3.1 in this line:

ReferenceAssemblyAnnotator/TunnelVisionLabs.ReferenceAssemblyAnnotator/TunnelVisionLabs.ReferenceAssemblyAnnotator.targets

Line 27 in cdebd00

<AnnotatedReferenceAssemblyDirectory Condition="'$(AnnotatedReferenceAssemblyDirectory)' == ''">$(NuGetPackageRoot)\microsoft.netcore.app.ref\$(AnnotatedReferenceAssemblyVersion)\ref\netcoreapp3.0\</AnnotatedReferenceAssemblyDirectory>

@sharwell How would you deal with generating the correct TFM to match the package version specified by AnnotatedReferenceAssemblyDirectory?