Can View bag be used to pass message from one action to another. How?

Use TempData or Session. TempData is actually a wrapper on Session. It would be something like thisthis.TempData["yourkey"] = yourData;Or in case of sessionthis.Session["yourkey"] = yourData;Difference is that data will be deleted form the session when read. (that's why its call temp data )ViewBag won't maintain data from action to action.