Nuget package installed but references not resolved

Question

I have a multi-project solution with Prism Nuget packages installed in several projects. I then attempted to add a Prism Mef extensions package to one of the projects using

Answer 1

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.