Master Numbers

using System;
using System.Collections.Generic;
using System.Numerics;


namespace MasterNumbers_23._05._2016
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            if (n >= 7)
            {
                List<int> result = MasterNumbers(n);

                foreach (int number in result)
                {
                    Console.WriteLine(number);
                }
            }
        }

        static List<int> MasterNumbers(int inputNumber)
        {
            List<int> masterNumbers = new List<int>();
            int currentNumber = 7;

            while (currentNumber <= inputNumber)
            {
                bool isPalindrome = PalindromeCheck(currentNumber);

                if (isPalindrome)
                {
                    bool isDigitsSumDiv7 = Div7Check(currentNumber);

                    if (isDigitsSumDiv7)
                    {
                        bool hasEvenDigits = EvenDigitsCheck(currentNumber);

                        if (hasEvenDigits)
                        {
                            masterNumbers.Add(currentNumber);
                        }
                    }
                }
                currentNumber++;
            }
            return masterNumbers;
        }
        static bool PalindromeCheck(int currentNumber)
        {
            bool isPalindrome = false;
            int cntEqualPairs = 0; // pairs of equal Digits
            char[] currNumbDigits = (currentNumber.ToString()).ToCharArray(); // splitting the current number into a separate digits.
            int lengthCurrNumb = currNumbDigits.Length;

            for (int iPal = 0; iPal < lengthCurrNumb / 2; iPal++)
            {
                if (currNumbDigits[iPal] == currNumbDigits[lengthCurrNumb - 1 - iPal])
                {
                   cntEqualPairs += 1;
                }
            }

            if (cntEqualPairs == lengthCurrNumb / 2)
            {
                isPalindrome = true;
            }
            else if (cntEqualPairs != lengthCurrNumb / 2)
            {
                isPalindrome = false;
            }
            return isPalindrome;
        }
        static bool Div7Check(int currentNumber)
        {
            ulong sum = 0; // number digits sum
            bool isSumDigitsDiv7 = false;

            while (currentNumber != 0)
            {
                sum = sum + (ulong)currentNumber % 10;
                currentNumber /= 10;
            }

            if (sum % 7 == 0)
            {
                isSumDigitsDiv7 = true;
            }
            else if (sum % 7 != 0)
            {
                isSumDigitsDiv7 = false;
            }
            return isSumDigitsDiv7;
        }

        static bool EvenDigitsCheck(int currentNumber)
        {
            bool hasEvenDigit = false;

            char[] currNumbDigits = (currentNumber.ToString()).ToCharArray(); // splitting the current number into a separate digits.
            int lengthCurrNumb = currNumbDigits.Length;

            for (int iCurr = 0; iCurr < lengthCurrNumb - 1; iCurr++)
            {
                int currNumbDigit = (int)Char.GetNumericValue(currNumbDigits[iCurr]); // getting the current character Numeric value

                if (currNumbDigit % 2 == 0)
                {
                    hasEvenDigit = true;
                    break;
                }
                else if (currNumbDigit % 2 != 0)
                {
                    hasEvenDigit = false;
                }
            }
            return hasEvenDigit;
        }
    }
}