Here is step by step guide to post tweet automatically to your twitter handler using C# .Net MVC. So, whenever you publish any content in your CMS website, you can tweet the same automatically same time.
Here is quick guidance to create RSS feed in Umbraco at any content node. No need to create controller or document type or any content page in Umbraco CMS. Just create Feed.cshtml template in Umbraco and you are good to generate RSS feed for any page and its child pages.