I have just spent half a day quietly going mad.
I\'m making changes to my classes in the Site.css file and they were not being reflected in the site being develope
The easiest way is to disable caching in your browser. If you can't or don't want to do this, you can press ctrl+f5.
Your server or asp application might be caching, too. You can disable this in the web.config or you can restart the development server to make sure the latest version of your file is shown to the user.