Keep ASP.NET error pages out of search engines

In error page:
Response.StatusCode = 404

http://www.dotnetnoob.com/2010/10/keep-aspnet-error-pages-out-of-search.html

How to replace icon with font for performence reason

All modern browsers (actually from IE6 onwards) have the ability to download extra fonts from your web server and use them as require


http://www.collectivematters.com/2012/02/optimizing-your-mvc4-app-to-the-max/