- Add lib or ref assemblies for the netstandard2.0 target framework

Some target frameworks declared in the dependencies group of the nuspec and the lib/ref folder do not have exact matches in the other location. Consult the list of actions below:

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'fullyQualifiedMetadataName' in 'INamedTypeSymbol? Compilation.GetTypeByMetadataName(string fullyQualifiedMetadataName)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'typeName' in 'FacetTargetModel? FlattenToGenerator.FindFacetModel(string typeName, Dictionary<string, FacetTargetModel> facetLookup)'.

Possible null reference argument for parameter 'typeName' in 'FacetTargetModel? FlattenToGenerator.FindFacetModel(string typeName, Dictionary<string, FacetTargetModel> facetLookup)'.

Possible null reference argument for parameter 'newSignature' in 'Task<Document> SourceSignatureCodeFixProvider.UpdateSourceSignatureAsync(Document document, AttributeSyntax attributeSyntax, string newSignature, CancellationToken cancellationToken)'.

XML comment has cref attribute 'FacetAttribute' that could not be resolved

XML comment has cref attribute 'FacetAttribute' that could not be resolved