ContentFiles are not added as link items in standard PackageReference

[jainaashish]

ContentFiles are not being added as link items in normal project system in PackageReference

Steps:

1. create c# class library
2. Install package contentfilesexample -v 1.0.2 as PackageReference

Expected:
It should have added content files as link items into the project. They should have also be available in projectName.csproj.nuget.g.props file

Actual:
Content files are neither in project system nor in .props file. Although they are there in project.assets.json file.

[jainaashish]

We explicitly avoid adding these content files into projectName.csproj.nuget.g.props file with the help of skipContentFileWrite flag in assets file. Because classic project system build tasks takes care of these content files and making them available as part of projects via design-time builds.