Master Numbers

using System;

namespace MasterNumbers
{
    class Program
    {
        public static void Main(string[] args)
        {
            int numberInput = int.Parse(Console.ReadLine());

            SymmetricNumber(numberInput);

        }

        static void SymmetricNumber(int numberInput)
        {
            string number = string.Empty;
            string allSymmetricNumbers = string.Empty;;
            bool numberIsSymmetric = false;

            for (int currentNumber = 1; currentNumber < numberInput; currentNumber++)
            {
                number = currentNumber.ToString();

                for (int currentChecker = 0; currentChecker < number.Length; currentChecker++)
                {
                    if (number[currentChecker] == number[(number.Length - 1) - currentChecker])
                    {
                        numberIsSymmetric = true;
                    }
                    else
                    {
                        numberIsSymmetric = false;
                        break;
                    }
                }

                if (numberIsSymmetric)
                {
                    allSymmetricNumbers += number + " ";
                    numberIsSymmetric = true;
                }
            }

            DivisibleBySeven(allSymmetricNumbers);
        }

        static void DivisibleBySeven(string numberInput)
        {
            string[] splittedStringToNumbers = numberInput.Split(' ');
            string currentNumber = string.Empty;
            string divisibleBySeven = string.Empty;
            int sumOfAllDigits = 0;

            for (int currentNumberFromArray = 0; currentNumberFromArray < (splittedStringToNumbers.Length - 1); currentNumberFromArray++)
            {
                currentNumber = splittedStringToNumbers[currentNumberFromArray];

                for (int elementFromCurrentNumber = 0; elementFromCurrentNumber < currentNumber.Length; elementFromCurrentNumber++)
                {
                    char currentElement = currentNumber[elementFromCurrentNumber];

                    switch (currentElement)
                    {
                            case '0': sumOfAllDigits += 0; break;
                            case '1': sumOfAllDigits += 1; break;
                            case '2': sumOfAllDigits += 2; break;
                            case '3': sumOfAllDigits += 3; break;
                            case '4': sumOfAllDigits += 4; break;
                            case '5': sumOfAllDigits += 5; break;
                            case '6': sumOfAllDigits += 6; break;
                            case '7': sumOfAllDigits += 7; break;
                            case '8': sumOfAllDigits += 8; break;
                            case '9': sumOfAllDigits += 9; break;
                    }
                }

                if (sumOfAllDigits % 7 == 0)
                {
                    divisibleBySeven += currentNumber + " ";
                }
                sumOfAllDigits = 0;
            }
            ContainsEvenDigit(divisibleBySeven);
        }

        static void ContainsEvenDigit(string numberInput)
        {
            string[] splittedString = numberInput.Split(' ');
            string currentNumber = string.Empty;
            string finalNumbers = string.Empty;
            int parseCurrentNumber = 0;
            bool containsEvenDigit = false;

            for (int currentNumberFromArray = 0; currentNumberFromArray < (splittedString.Length - 1); currentNumberFromArray++)
            {
                currentNumber = splittedString[currentNumberFromArray];

                for (int elementFromCurrentNumber = 0; elementFromCurrentNumber < currentNumber.Length; elementFromCurrentNumber++)
                {
                    char currentElement = currentNumber[elementFromCurrentNumber];

                    switch (currentElement)
                    {
                            case '0': parseCurrentNumber = 0; break;
                            case '1': parseCurrentNumber = 1; break;
                            case '2': parseCurrentNumber = 2; break;
                            case '3': parseCurrentNumber = 3; break;
                            case '4': parseCurrentNumber = 4; break;
                            case '5': parseCurrentNumber = 5; break;
                            case '6': parseCurrentNumber = 6; break;
                            case '7': parseCurrentNumber = 7; break;
                            case '8': parseCurrentNumber = 8; break;
                            case '9': parseCurrentNumber = 9; break;
                    }

                    if (parseCurrentNumber % 2 == 0)
                    {
                        containsEvenDigit = true;
                    }
                }

                if (containsEvenDigit)
                {
                    finalNumbers += currentNumber + " ";
                    containsEvenDigit = false;
                }
            }

            Console.WriteLine(finalNumbers);
        }
    }
}