public ActionResult Result(AddNumbersModel model)
        {
            ViewBag.Result = model.NumberOne + model.NumberTwo;
            if (model.NumberOne <= 0 || model.NumberOne > 1000 || model.NumberOne.Equals(null))
            {
                ModelState.AddModelError("NumberOne", "Number must be between 1 and 100");
            }
            if (model.NumberTwo <= 0 || model.NumberTwo > 1000 || model.NumberTwo.Equals(null))
            {
                ModelState.AddModelError("NumberTwo", "Number must be between 1 and 100");
            }

            return(View(model));
        }
 public ActionResult About(AddNumbersModel model)
 {
     return(RedirectToAction("Result"));
 }
 public string Addition([FromBody] JObject data)
 {
     return(AddNumbersModel.AddValues(data));
 }