title: I can resolve "Unable to connect to web server 'IIS Express'", but it returns just days later. Why is that?
body: <p>I am constantly getting the following error when attempting to debug my .NET Core 3.0 project in Visual Studio 2019:</p>
  <blockquote>
  <p>Unable to connect to web server 'IIS Express'</p>
  </blockquote>
  <p>I am able to resolve this issue after going through the following list:</p>
  <ul>
  <li>Delete <code>applicationhost.config</code></li>
  <li>Delete the entire <code>/Documents/IISExpress</code> folder</li>
  <li>Reinstall VIsual Studio</li>
  <li>Reinstall IIS</li>
  </ul>
  <p>After some combination of these (that seems to vary from day to day), the project builds and all is well. But a few days later (in some cases the very next day), the issue is back, and I have to repeat these steps all over again. You can imagine how frustrating this becomes.</p>
  <p>Does anyone know why this issue continues to happen? Is it something I'm unknowingly causing?</p>