even and odd subtraction / lists

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

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

            List<int> numbers = Console.ReadLine().Split().Select(int.Parse).ToList();

            List<int> numbersNew = new List<int>();

            numbersNew.AddRange(numbers);

            numbers.RemoveAll(a => a % 2 == 0);

            int evenSum = numbers.Sum();

            numbersNew.RemoveAll(a => a % 2 != 0);

           int oddSum = numbersNew.Sum();

            int output = oddSum - evenSum;

            Console.WriteLine(output);
        }
    }
}