ASP.NET MVC Permanent 301 redirects for legacy routes

Having a good url routing scheme is extremely important when developing an application. Urls should be canonical to aid in search engine optimization and discoverable in order to aid users in learning where to find application functionality for particular tasks. But there are points in an applications lifecycle where one wishes to change the url routing scheme in order to employ a better one. In such instances, URL redirection can be used to preserve search engine rankings, user bookmarks to specific pages or to allow more than one URL to serve up the same content, as is the case when employing URL shortening.