private static CategoriesClass _instance = null; //Singleton pattern

        public static CategoriesClass Instance()         //Lazy Load initiation
        {
            if (_instance == null)
            {
                _instance = new CategoriesClass();
            }
            return(_instance);
        }
        public string ByCategory(int i)
        {
            List <Category> category = CategoriesClass.Instance().parseCategories();
            int             z        = 0;

            foreach (CategoriesClass.Category category1 in category)
            {
                if (z == i)
                {
                    return(category1.category);
                }
                z++;
            }
            return(null);
        }