title: @addTagHelper could not load file or assembly
body: <p>I have an ASP.NET core project generated with Yeoman generator-aspnet.
  My problem is that I can't use the generator provided tag helper (and my test tag help doesn't work either).
  The project name is <code>react_tests</code>, and this is the <code>_ViewImports.cshtml</code> file</p>
  
  <pre><code>@using react_tests
  @using react_tests.Models
  @using react_tests.Models.AccountViewModels
  @using react_tests.Models.ManageViewModels
  @using Microsoft.AspNetCore.Identity
  @addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
  @addTagHelper *, react_tests
  </code></pre>
  
  <p>I tried replacing the last line with:</p>
  
  <pre><code>@addTagHelper "*, react_tests"
  </code></pre>
  
  <p>and</p>
  
  <pre><code>@addTagHelper "*, TagHelpers"//the folder for tag helpers
  </code></pre>
  
  <p>and</p>
  
  <pre><code>@addTagHelper "react_tests.TagHelpers.MenuLinkTagHelper, react_tests"
  </code></pre>
  
  <p>But I always receive the following error:</p>
  
  <blockquote>
    <p>Cannot resolve TagHelper containing assembly 'react_tests'. Error: Could not load file or assembly 'react_tests, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.</p>
  </blockquote>