Building an ASP.NET MVC sitemap provider with security trimming

If you have been using the ASP.NET MVC framework, you possibly have been searching for something like the classic ASP.NET sitemap. After you've played with it, you even found it useful! But not really flexible and easy to map to routes and controllers. In this post, Maarten describes how to build a custom sitemap provider which uses ASP.NET MVC route data and AuthorizeAttribute to render MCS sitemap data with security trimming enabled!