title: Visual Studio/ NuGet missing references
body: <p>I had some problems with my solution's references since somebody went and messed up NuGet... restoring from source control rendered the projects unloadable, and I had to play around a bit to finally get things to load.  When I was finally able to get my projects to load properly (after one heck of a headache), I had a pretty big experimental mess to clean up, and now nothing builds.</p>
  
  <p>Nuget thinks my dependencies are installed.  Visual Studio disagrees.</p>
  
  <p><img src="https://i.stack.imgur.com/JP6oa.png" alt="enter image description here"></p>
  
  <p>What do I have to do to make NuGet and Visual Studio agree with each other?</p>