title: Where is the "Add package" lightbulb in Visual Studio 2017?
body: <p>In C# in Visual Studio 2015 if you specify a name present in a package not currently referenced then the Lightbulb feature pops-up and suggests a package reference to add.</p>
  
  <p>[<img src="https://i.stack.imgur.com/vE4GT.png" alt="enter image description here">]</p>
  
  <p>I can't seem to get this in Visual Studio 2017. Is there some extension I need to install or some other setting?</p>