title: Interop type 'ProjectKinds' cannot be embedded. Use the applicable interface instead
body: <p>I´m developing a visual studio extension, but unfortally I can´t check the project kind , please look de follow code:</p>
  
  <pre><code> if (project.Kind == EnvDTE80.ProjectKinds.vsProjectKindSolutionFolder)
              {
                  list.AddRange(GetSolutionFolderProjects(project));
              }
              else
              {
                  list.Add(project);
              }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/tfnRA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tfnRA.png" alt="enter image description here"></a></p>