rekursivno dali edna cifra se sudurja v chislo

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

namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Br(10,0));
        }
        static bool Br (int n, int k)
        {
            if(n/10==0 && k!=0) return false;
            if (n % 10 == k) return true;
            return Br(n / 10, n);
        }
    }
}