no if no IF it is possible

6.js

   public class _null
    {
        private static string[] _dividers3 = new string[] { "f", string.Empty, string.Empty };
        private static string[] _dividers5 = new string[] { "bu", string.Empty, string.Empty, string.Empty, string.Empty };
        private static string[] _results = new string[] { "", "fizz", "buzz", "fizzbuzz" };

        public string FizzBuzz(int i)
        {
            _results[0] = i.ToString();
            return _results[(_dividers3[i % 3] + _dividers5[i % 5]).Length];
        }
    }