title: Solution for [Cannot update project reference ''] & [Validating Web Site] delay
body: <p>Folks,
  I have a an old ASP.Net website that I have to modify occasionally.</p>
  <p>When I go to build or run the site, I get</p>
  <blockquote>
  <p>Cannot update project reference ''.
  Source project not
  available.Validating Web Site</p>
  </blockquote>
  <p>It then steps through each folder and page in the project &amp; &quot;Validates&quot; it. The site is quite sizable, and can take 5+ minutes on my beefy Windows-7 PC.</p>
  <p>Anyone any ideas how I can track down the '' project reference and get rid of this? The Validation is breaking my heart, small change, run, wait 5 minutes, test, small change, run wait 5 minutes . . . <em>gag</em></p>
  <p>ASP.Net isn't my bag so forgive me if this is a school boy error.</p>