public ActionResult Create()
 {
     ViewBag.FieldArgument = "";
     var model = new MyModel()
     {
         MyArrayOfStrings = new string[] { "", "" }
     };
     return View(model );
 }
        public ActionResult Create(MyModel model, string fieldArgument)
        {
            if (ModelState.IsValid)
            {
                //The model is OK. We can do whatever we want to do with the model
                model.MyMessage = "Model Ok Updated @ " + DateTime.Now;
            }

            ViewBag.FieldArgument = fieldArgument;
            return View(model);
        }