Fetch Primes C#

PrimeFetcher.cs

 public class PrimeFetcher
    {
        public IEnumerable<int> FetchPrimesUpTo(int max)
        {
            if (max <= 1)
                return Enumerable.Empty<int>();

            var range = Enumerable.Range(0, max + 1).ToArray();
            range[1] = 0;

            foreach (var number in range.Where(n => n != 0 && n <= max / 2))
            {
                foreach (var multiple in GetMultiples(number, max))
                    range[multiple] = 0;
            }
            return range.Where(number => number != 0);

        }

        private static IEnumerable<int> GetMultiples(int number, int max)
        {
            return Enumerable.Range(2, max / number).Select(multiplier => multiplier * number).Where(result => result <= max);
        }
    }