BigInteger e otgovora:)

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

namespace fakt
{
    class fakt
    {
        static void Main(string[] args)
        {


            Console.Write("Vuvedete n=");
            int n=int.Parse(Console.ReadLine());
            BigInteger faktorial = n;
            for (int i = 1; i < n; i++)
            {

                faktorial = faktorial * (n - i);


            }

            Console.WriteLine("Faktorial ot  " + n +"= ");
            Console.WriteLine(faktorial);
        }
    }
}