I have registered a custom model binder for MyList in global.asax. However the model binder does not fire for nested properties, for simple types it works fine. In the example below, it fires for Index() but not does not fire for Index2()I'm running ASP.NET MVC4Global.asax\[code\]protected void Application_Start(){ AreaRegistration.RegisterAllAreas(); ModelBinders.Binders.Add(typeof(MyList), new MyListBinder()); WebApiConfig.Register(GlobalConfiguration.Configuration); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes);}\[/code\]Code:\[code\] public class MyListBinder : IModelBinder { public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) { return new MyList(); } } public class MyList { public List<int> items { get; set; } } public class MyListWrapper { public MyList listItems { get; set; } } public class TestController : Controller { public ActionResult Index(MyList list) // ModelBinder fires { return View(); } public ActionResult Index2(MyListWrapper wrapper) // ModelBinder does not fire! :-( { return View(); } }\[/code\]