title: Why is my CSS bundling not working with a bin deployed MVC4 app?
body: <p>I have bin deployed an MVC4 application to my hosting provider, based on advice given here and one or two on-the-fly fixes, but the most immediately apparent problem is that the bundling for css doesn't work. When I replace the bundle ref with explicit file refs, my css works again.</p>
  
  <p>I am using a standard MVC4 RTM project template from VS2012. The provider is running IIS 7.5 and ASP.NET 4, and my previous MVC3 version of the same app worked fine. I am guessing I have grabbed a dependency somewhere of too low a version, and this might also contribute to my <a href="https://stackoverflow.com/questions/11531046/what-is-wrong-with-my-area-routing-in-my-bin-deployed-mvc4-app">area based action link problem</a>.</p>
  
  <p>Technical symptoms are:</p>
  
  <p>The line <code>@Styles.Render("~/Content/css")</code> renders as <code>&lt;link href="/Content/css?v=" rel="stylesheet"/&gt;</code></p>