title: Not able to reference namespace from project
body: <p>I have a few folders inside my interfaces sub project. I can "see" two of them, but not the third. The reference is obviously added, otherwise I wouldn't be able to "see" or access any of the namespaces inside the sub project. </p>
  
  <p>Any ideas what could be wrong here?</p>
  
  <p><a href="https://i.stack.imgur.com/7US8z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7US8z.png" alt="missing namespace reference"></a></p>
  
  <p>File <strong>ProjectContext.cs</strong> from project <strong>Project.Data</strong> needs to inherit an interface from another project <strong>Project.Interfaces</strong>. </p>
  
  <p><strong>Project.Data</strong> has a reference to <strong>Project.Interfaces</strong>. </p>
  
  <p>The interface is located in <strong>Project.Interfaces\Data\IProjectContext.cs</strong>. </p>
  
  <p>For whatever reason the <strong>Data</strong> directory is not visible in the autocomplete provided by Visual Studio. I am not able to access the <strong>Project.Interfaces.Data</strong> namespace.</p>
  
  <p><code>project.json</code> from <strong>Project.Data</strong></p>
  
  <pre><code>{
    "version": "1.0.0-*",
  
    "dependencies": {
  "Project.Interfaces": "1.0.0-*",
  "Microsoft.EntityFrameworkCore.SqlServer": "1.1.0",
  "NETStandard.Library": "1.6.1",
  "System.ComponentModel.Annotations": "4.3.0"
  },
  
  "frameworks": {
  "netstandard1.6": {
    "imports": "dnxcore50"
  }
  }
  }
  </code></pre>
  
  <p><code>ProjectContext.cs</code></p>
  
  <pre><code>namespace Project.Data
  {
  public class ProjectContext : DbContext
  {
      public ProjectContext(DbContextOptions&lt;ProjectContext&gt; options) : base(options)
      {
          Database.EnsureCreated();
      }
  
  }
  }
  </code></pre>
  
  <p><code>IProjectContext.cs</code></p>
  
  <pre><code>namespace Project.Interfaces.Data
  {
      interface IProjectContext
      {
  
      }
  }
  </code></pre>