Task.01.03.Is Third Digit Seven рекурсия

using System;
class IsThirdDigitSeven
{
    static void Main()
    {
        int number = 234;
        bool isSeven = FindWithRecursion(number);
        if(appearance != 0)
        {
            if(isSeven)
            {
                Console.WriteLine("Is thrid digit Seven: " + isSeven + " Appearance: " + appearance);
            }
            else
            {
                Console.WriteLine("Appearance: " + appearance + " but not at third position");
            }
        }
        else
        {
            Console.WriteLine("Number not consist digit Seven at all");
        }
    }
    static int appearance = 0;
    static bool FindWithRecursion(int number)
    {
        if(number % 10 == 7)
        {
            appearance++;
        }
        if(number / 10 == 0)//делима на 10 за последната цифра, и така се предпазваме да не влезнем по надолу
        {
            return false;
        }
        else if((number % 10 == 7) && (number / 1000) == 0)
        {
            return true;
        }
        return FindWithRecursion(number / 10);
    }
}