Fibonacci of array elements C#, C#

Fibonacci of array elements C#

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

namespace Rextester
{
    public class Program
    {
        public static int fib(int cnt)
        {
         if (cnt <= 1)
        return cnt;
        else 
        return (fib(cnt-1) + fib(cnt-2));
        }
        public static void arrFib(int item)
        {
        for(int i=0; i <=item-1;i++)
            {
                int result = fib(i);
         
                if(i==item-1)
                {
                    Console.WriteLine("Fibonacci of "+item.ToString()+" is "+result.ToString());
                }
            }
        }
        public static void Main(string[] args)
        {
            int[] arr = new int[]{5,2,3,4,7,8,9,10,11,12,13,14,15,16};
            List<int> listInt = arr.ToList();
            Parallel.ForEach(listInt, l =>  
              {  
                  Program.arrFib(l);
              });
          
        }
    }
}


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