Does a child action share the same ViewBag with its “parents” action?
Child actions follow a different controller/model/view lifecycle than parent actions. As a result they do not share ViewData/ViewBag. If you want to pass parameters to a child action from the parent you could do this: @Html.Action(“Child”, new { message = ViewBag.Message }) and in the child action: public ActionResult Child(string message) { … }