Sieve of something

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SieveOfErathosthen
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine()) + 1;

            bool[] A = new bool[n];
            for (int i = 2; i < n; i++)
            {
                A[i] = true;
            }
            for (int i = 2; i < n; i++)
            {
                if (A[i])
                {
                    for (int j = 2; (j * i) < n; j++)
                    {
                        A[j * i] = false;
                    }
                }
                if (A[i])
                {
                    Console.Write("{0} ", i);
                }
            }
            Console.WriteLine();
        }
    }
}