Difference Between ViewResult() and ActionResult()

Question

What is the difference between ViewResult() and ActionResult() in ASP.NET MVC?

public ViewResult Index()
{
    return View();
}

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Answer 1

It's for the same reason you don't write every method of every class to return "object". You should be as specific as you can. This is especially valuable if you're planning to write unit tests. No more testing return types and/or casting the result.