DaST is a new architectural pattern for building highly dynamic Web 2.0 applications. A web page is rendered as a set of randomly nested rectangles where each rectangle is controlled individually and every combination of rectangles can be partially updated via AJAX. DaST technology is a big shift to web development paradigm. It was designed specifically to turn creating of highly dynamic Web 2.0 apps into a trivial task. ASP.NET DaST proves that tiny open-source toolset can accomplish the job of highest complexity, outperforming monsters like standard WebForms and MVC in simplicity, architecture, flexibility, performance, presentation separation, and many other important web development aspects.