I am a skilled asp.internet developer that has begun developing in php, particularly in wordpress. I am impressed with the simplicity of shortcodes in wordpress and just how simple they're to build up in php. I understand you will get similar functionality from user controls in asp.internet but they're less intuitive and easy to use for that consumer as shortcodes are. Can there be any free (or commercial) development of the shortcode parsing/rendering engine for asp.internet? Otherwise, an amount be my ultimate way in developing this? Thanks ahead of time for just about any information or suggestions.

Try ASP.Internet Routing, Request Handlers (ashx or web.config-based), WebMethods, or Razor pages. Just the last requires MVC or ASP.Internet Webpages (Razor-formatted cshtml pages).