public ActionResult UpdateField(OptionalFields field)
        {
            List <string> res    = new List <string>();
            bool          status = false;

            if (ModelState.IsValid)
            {
                try
                {
                    Commonhelper.UpdateFieldbyId(field);
                    res.Add("Update Successfully.");
                    status = true;
                }
                catch (Exception ex)
                {
                    res.Add("Error in Field updation!");
                    status = false;
                }
            }
            else
            {
                foreach (var modelState in ModelState.Values)
                {
                    foreach (var modelError in modelState.Errors)
                    {
                        res.Add(modelError.ErrorMessage);
                    }
                }
            }
            return(Json(new { res, status }, JsonRequestBehavior.AllowGet));
        }