title: VS2012 Assembly is incorrectly specified as a file
body: <p>I am getting this warning on assembly references in a VS2012 Winforms application project. In this case the references are for Infragistics controls used by the app, which are located in the bin folder.</p>
  
  <p>This issue has been addressed in the following link, but the answer ("set the Build Action" property) doesn't work because there is no Build Action property in VS2012 for referenced assemblies.</p>
  
  <p><a href="https://stackoverflow.com/questions/436471/vs2005-assembly-assembly-is-incorrectly-specified-as-a-file">VS2005: Assembly &#39;&lt;assembly&gt;&#39; is incorrectly specified as a file.</a></p>
  
  <p>What's the fix?</p>