Methods - 12.Master Number

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

namespace Methods_MasterNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            for (int i = 232; i <= n; i++)
            {
                if (IsPalindrome(i) && HoldsEvenAndDivisibleBySeven(i))
                {
                    Console.WriteLine(i);
                }
            }



        }
        static bool IsPalindrome(int number)
        {
            int oldNumber = number;
            int numberLength = 2;
            number = number / 100;
            while (number > 0)
            {
                number = number / 10;
                numberLength++;
            }
            for (int i = 0; i < numberLength; i++)
            {
                int digitEnd = (int)Math.Floor((oldNumber / Math.Pow(10, i))) % 10;
                int digitStart = (int)Math.Floor((oldNumber / Math.Pow(10, numberLength - 1 - i))) % 10;
                if (digitEnd != digitStart)
                {
                    return false;
                }
            }
            return true;
        }
        static bool HoldsEvenAndDivisibleBySeven(int number)
        {
            int sum = number % 10;
            number = number / 10;
            bool holdsEven = false;
            while (number > 0)
            {
                sum += number % 10;
                if ((number % 10 )% 2 == 0)
                {
                    holdsEven = true;
                }
                number = number / 10;
            }
            if (sum % 7 == 0 && holdsEven)
            {
                return true;
            }
            return false;
        }

    }
}