title: Xamarin Archive tool - Seemingly normal error but unknown cause
body: <p>Today, for no reason that I can determine, my Android builds started showing this error below whenever I try to archive them:</p>
  
  <p><code>Please ensure that you are using a release configuration and that the "Use Shared Mono Runtime" option in your project's build options is unchecked.</code></p>
  
  <p>I have, of course, ensured that the "Use Shared Runtime" (that's the closest thing to the error message) option is unchecked. I am also using the same exact Release configuration that has successfully built and archived for months, including last week.</p>
  
  <p>All that said, has anyone else encountered this error and know of a way around it? </p>
  
  <p>Things I have tried:</p>
  
  <ul>
  <li>Clean, rebuild, archive.</li>
  <li>Clean, close VS, delete bin/obj, re-open, rebuild, archive.</li>
  <li>Clean, reboot machine, delete bin/obj, re-open VS, rebuild archive.</li>
  <li>Revert to previous app code, #1-3.</li>
  <li>Give up, Google It, find nothing, ask Xamarin.</li>
  <li>Get impatient. Ask SO.</li>
  </ul>
  
  <p>Any ideas would be very welcome.</p>