New to Umbraco 4.5, XSLT extensions in the /App_Code folder
provides code that is right in front of you and easy to edit (even
for non-"VisualStudio junkies"). App_Code XSLT extensions are
strongly-defined (safer), cached-at-application-level (faster), and
medium-trust-capable (cheaper hosting). Wow!
And they are so easy to make! Let me show you how.