title: Why doesn't Installed packages show the package I just installed?
body: <p>I've been getting started with Nuget. Some of my projects allow me to Add Library Package Reference to a Nuget package, but then when I select  "Installed Packages" I don't see any packages listed.
  Why not?</p>
  
  <p>EDIT - I know the answer (see below), was going to answer this myself as a "community service" but can't for another 8hrs due to my lame rep score. </p>
  
  <p>Answer will be:
  The project already had a packages.config file in the same directory as the csproj file, BUT the packages.config file was not added to the project. Fixed by "Add existing item" and selecting the packages.config file.</p>
  
  <p>Note: in hindsight, the pink '"packages.config" already exists, Skipping' message in the nuget progress window should have alerted me to this.</p>
  
  <p>Hope this helps someone.</p>