title: COM object that has been separated from its underlying RCW cannot be used
body: <p>I am trying to use the OpcRcw.da.dll.  If I interop this dll inside a test console project everything works, but if I build dll project to do my interop gymnastic and ref my library into my console project I am getting this error:</p>
  
  <blockquote>
    <p>COM object that has been separated from its underlying RCW cannot be used.</p>
  </blockquote>
  
  <p>What need to be done to a class lib project to not kill the RCW ref?</p>