Find Next Natural Number in Int Array

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Find the next natural number in an integer array: A common coding challenge for algorithmic problem-solving.

Find the Natural number in int array.

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

namespace ConsoleApp4
{
    internal class Program
    {
        static void Main(string[] args)
        {
           int[] ints = { 4,1, 2, 6, 8, 79 };
            int nextNumber = 1;

            while (nextNumber>0 && nextNumber<=ints.Length)
            {
               var result=ints.Where(s=>s.Equals(nextNumber)).FirstOrDefault();
                if(result==0)
                {
                    Console.WriteLine(nextNumber);
                    break;
                }
                else
                {
                    nextNumber++;
                }
            }
            Console.ReadLine();
        }
    }
}