public static class ViewModelCaller<TController> where TController : Controller
    {
        public static ViewResult FromVm<TVm>() where TVm : ViewModelEx
        {
            var viewModelType = typeof(TVm);
            var controllerType = typeof(TController);
            var result = Controller.Action(controllerType.Name, viewModelType.Name).Result as ViewResult;
            return result;
        }

        public static ViewResult FromVm<TVm, TC>(object model) where TVm : ViewModelEx where TC : Controller
        {
            var type = typeof(TVm);
            var controllerType = typeof(TController);
            var result = Controller.Action(controllerType.Name, type.Name, new { model }).Result as ViewResult;
            return result;
        }
    }