using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var total = 10000;

        List<int>primes = new List<int>();

        for(int myNum = 1; myNum <= total; myNum++)

        {

            int divisor = 2;

            while(divisor <= myNum)

            {

                if(divisor != myNum & myNum%divisor == 0)

                {

                    divisor++;

                    break;

                }

                else

                {

                    primes.Add(myNum);

                    break;

                }

            }

        }

        Console.WriteLine(string.Format("Found the following primes between 1 and " + total.ToString() + ": " + string.Join(", ", primes)));

    }       

}

​