Another application configuration setting you will observe in web.config of your ASP.NET MVC application is webpages:Version <add key="webpages:Version" value="" /> The value for this setting currently is showing This indicates the version of Webpages - Razor view engine is to be used. This application setting was introduced during update release of ASP.NET MVC 3 and is used to identify which Razor view engine to be used for handling webpages in your MVC application. Based on my digging into ASP.NET WebStack codebase on codeplex, Build and Revision component of version number are optional or can differ. If these two components of version number are not present or not found to be valid System.Web.WebPages.Deployment library fixes it to x.x.0.0 and returns the version number. What will happen if webpages:Version » Read more