Sum the reversed numbers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;

namespace SumReversedNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> num = Console.ReadLine()
                .Split(' ')
                .ToList();
            long sum = 0;
            List<string> revNums = new List<string>();
            for (int i = 0; i < num.Count; i++)
            {
                string number = num[i];
                char[] arr = number.ToCharArray();
                char[] rev = arr.Reverse().ToArray();
                string reversed = string.Join("", arr);
                long numFinal = long.Parse(reversed);
                sum += numFinal;
            }
            Console.WriteLine(sum);
        }
    }
}