Write a C# Sharp program to compute the sum of the three integers. If one of the values is 13 then do not count it and its right towards the sum

using System;
using System.Linq;
namespace exercises
{
   class Program
    {       
        static void Main(string[] args)
        {
            Console.WriteLine(test(4, 5, 7));
            Console.WriteLine(test(7, 4, 12));
            Console.WriteLine(test(10, 13, 12));
            Console.WriteLine(test(13, 12, 18));
            Console.ReadLine();
        }
        
        public static int test(int x, int y, int z)
        {
           if (x == 13) return 0;
           if (y == 13) return x;
           if (z == 13) return x + y;
           return x + y + z;
        }
    }
}