title: All project references have yellow triangles every time solution is loaded
body: <p>All my project (from the same solution) references are marked with a yellow triangle. The projects are all set to the same .NET version (4.5.1). The error log says: </p>
  
  <p><em>The project 'CommonLibrary' cannot be referenced.</em></p>
  
  <p>A way to temporarily fix the issue is to either:</p>
  
  <ol>
  <li>Remove and re-add the references</li>
  <li>Right click and choose Add Service Reference and immediatelly cancel.</li>
  </ol>
  
  <p>However, the triangles come back every time I start the solution. </p>
  
  <p>The solution is build successfully regardless or the issue. The real issue is that Resharper acts like the references don't exist.</p>
  
  <p>Another thing that might be relevant is that I have 2 projects that are supposed to be unloaded but they become active every time I load the solution.</p>
  
  <p>Any idea what to do with the issue?</p>