title: How to put an asp.net application into offlince/maintenance mode?
body: <p>I've developed my first web application which, surprisingly, is getting very popular.</p>
  <p>Because the website is now live, I have a hard time doing some changes, in fear some people are still logged in and are using the application.</p>
  <p>I wish to avoid having a duplicated instance of the web application for testing.</p>
  <p>Is there any way to put the website in 'maintenance mode' with only me having access to it? Like redirecting to a page with some info, telling its in maintenance mode.</p>