What the others said. :) However, you should consider your own situation. WebForms still works fine. MVC is "cooler" but the transition from WebForms to MVC.NET is not easy. If you used the AJAX Toolbox (or whatever it was called): it's been abandoned. Instead, MS chose to support the community behind jQuery. So if you're just updating an existing site, perhaps you would get by simply making things nicer with jQuery. If on the other hand you would like to be more up to date, you should probably look into MVC.NET (and perhas some of the other things mentioned in these replies). The problem with web development is that things move so fast that as soon as you get the hang of a language or framework, it's almost obsolete, especially if you're not working with web development on a daily basis.