public Model.CategoryModel Create(Model.CategoryModel model)
        {
            Model.CategoryModel objReturn = null;

            string json = JsonConvert.SerializeObject(model);

            string result = base.Post(apiPrefix, json);

            if (!string.IsNullOrEmpty(result))
            {
                var objCreate = JsonConvert.DeserializeObject<Model.CreateCategoryReturnModel>(result);
                objReturn = objCreate.Category;
            }

            return objReturn;
        }
        public Model.CategoryModel GetById(int Id)
        {
            Model.CategoryModel objReturn = null;

            string result = base.Get(apiPrefix);

            if (!string.IsNullOrEmpty(result))
            {
                var objList = JsonConvert.DeserializeObject<List<Model.CategoryModel>>(result);
                objReturn = objList.
                    Where(w => w.Id == Id)
                    .FirstOrDefault();
            }

            return objReturn;
        }