private IEnumerator GetEnumerator_UsingCustomArrayEnumerator()
        {
            var iterator = new ArrayEnumerator(this.backingArray);

            return(iterator);
        }
        private IEnumerator <T> GetGenericEnumerator_UsingCustomArrayEnumerator()
        {
            var iterator = new ArrayEnumerator <T>(this.backingArray);

            return(iterator);
        }