Controllers and actions

- [Instructor] This section is pretty brief,…I just want to call out the differences…between prior versions and ASP.NET Core,…and a lot of these have already been mentioned…but it's worth calling them out again.…So in ASP.NET Core, we only have controllers.…AsyncController, and APIController are all supported…now by just one class called Controller.…All action methods on the Controller class return…an IActionResult or Task of IActionResult,…or a derivative of IActionResult.…

And this is different than prior where it might return…IActionResult or if it was an API style method,…an IHttp ActionResult,…so it's all been consolidated into one.…There's also a whole host of additional helper methods…built into the base controller class, for example,…NoContent, OK, BadRequest, you don't have to remember…the different HttpStatusCodes,…you can call this helper method to return…the appropriate content.…

Another change between web API and ASP.NET Core…is that in web API 2.2 you could name your action method…based on the HTTP verb it represented,…