Triple Rotation Of Digits

using System;

class TripleRotationDigits
{
    static void Main()
    {
        int kNumber = int.Parse(Console.ReadLine());
        int currentDigit=0;
        int[] digits = new int[6];
        int counter = 5;
        int kNumberOfDigits = 0;
        int exchange;

        //take digits
        while (kNumber > 0)
        {
            currentDigit = kNumber % 10;
            kNumber = kNumber / 10;

            digits[counter] = currentDigit;
            counter--;
            kNumberOfDigits++;
        }

        //3 exchanges
        for (int j = 1; j <= 3; j++)
        {
            exchange = digits[5];

            for (int i = 5; i > 0; i--)
            {
                digits[i] = digits[i - 1];
            }
            digits[6 - kNumberOfDigits] = exchange;

            if (exchange == 0)
            {
                kNumberOfDigits--;
            }
        }

        bool firstDigitExists = false;

        for (int i = 0; i <=5; i++)
        {
            if (digits[i] != 0)
            {
                firstDigitExists = true;
            }

            if (firstDigitExists)
            {
                Console.Write(digits[i]);
            }
        }
    }
}