return generic action post method mvc in controller

Question

I'm interested in Redirect of reference action post And I want it to be similar to the generic

        ActionResult action = new DashboardController().Index(3);
        return action;

i wants code like this

Because I redirect to a page using the POST I can't using this

return RedirectToAction(actionName, controllerName);

Example

        public ActionResult generic(string Controller,string Action)
        {
            Assembly asm = Assembly.GetAssembly(typeof(MvcApplication));

            var controlleractionlist = asm.GetTypes()
                    .Where(type => typeof(Controller).IsAssignableFrom(type));

            return typeof(typeof(controlleractionlist).GetProperty(Controller))
           .GetProperty(Action);
            }

Links can help Perhaps the answer Link 1 link 2

I apologize in advance for my English