MVC6的内置ActionResult类型

BadRequestObjectResult，BadRequestResult	http 400 bad request
ChallengeResult
ContentResult
CreatedAtActionResult
CreatedAtRouteResult
CreatedResult
EmptyResult
FileContentResult
FileResult
FileStreamResult
ForbidResult
HttpNotFoundObjectResult，HttpNotFoundResult	404
HttpOkObjectResult，HttpOkResult	200
HttpStatusCodeResult
HttpUnauthorizedResult	401
LocalRedirectResult	redirect to the supplied local URL
NoContentResult
ObjectResult
PhysicalFileResult
RedirectResult
RedirectToActionResult
RedirectToRouteResult
UnsupportedMediaTypeResult
VirtualFileResult