ActionResult is an abstract class means ViewResult derives from ActionResult.
You declare it this way so you can take advantage of polymorphism and return different types in the same method.
Eg:
public ActionResult Foo()
{
if (someCondition)
return View(); // returns ViewResult
else
return Json(); // returns JsonResult
}
I above example the return type of Foo() is "ActionResult" so now i am not bound to return...
