using System;

​

public class Program

{

    static bool isPrime(int x)

    {

        for (int i = 2; i <= Math.Sqrt(x); i++)

        {

            if (x%i==0)

                return false;

        }

        return true;

​

        // bool is a boolean type that has value of true/false

        // please implement this method

    }

​

    public static void Main()

    {

        for (int i = 2; i < 500; i++)

        {

            if (isPrime(i))

                Console.WriteLine(i);

        }

    // please implement this program        

    }

}