title: Area links don't generate in asp.net-core-mvc
body: <p>Following this guide I've been creating an Admin area:
  <a href="https://docs.asp.net/en/latest/mvc/controllers/areas.html" rel="noreferrer">https://docs.asp.net/en/latest/mvc/controllers/areas.html</a></p>
  
  <p>I can navigate to the admin pages by directly typing in the url, however I can't get links to generate</p>
  
  <p>I've tried placing the following on the Admin index.cshtml:</p>
  
  <pre><code>&lt;p&gt;&lt;a asp-action="Index"&gt;Admin Index&lt;/a&gt;&lt;/p&gt;
  &lt;p&gt;&lt;a asp-controller="Home" asp-action="Index"&gt;Admin Index&lt;/a&gt;&lt;/p&gt;
  &lt;p&gt;&lt;a asp-area="Admin" asp-controller="Home" asp-action="Index"&gt;Admin Index&lt;/a&gt;&lt;/p&gt;
  </code></pre>
  
  <p>Yet the all end up being non clickable anchors (no href)</p>
  
  <p>In fact, when I view source, I actually still see the "asp-action" etc tags</p>
  
  <pre><code>&lt;a asp-action="Index"&gt;Admin Index&lt;/a&gt;
  </code></pre>
  
  <p>MVC doesn't seem to be processing the link helper tags?</p>
  
  <p>Any idea what I've missed? Perhaps a configuration step somewhere?</p>
  
  <p>Thanks</p>