Nuget package installed but references not resolved

You need to follow this procedure.

1. Update-Package -reinstall

2. Restart visual studio.

You may want to check the .NET version of the package vs. your project.

I had an instance where my project was .NET 4.6.1, and the package I was attempting to install was using version 4.6.2. After updating my project to the same .NET version, the reference showed up.

Within the Package Manager Console run the following command:

Update-Package -reinstall

This will reinstall each nuget package within that project which should resolve any missing references.

If you know you're missing a specific reference:

Update-Package -reinstall <Package-Name>

I just closed Visual Studio and reopened it and references are resolved...!