print and sum (with array)

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


namespace whatevs
{
    class Program
    {
        static void Main(string[] args)
        {
            int start = int.Parse(Console.ReadLine());
            int end = int.Parse(Console.ReadLine());

            int n = end - start + 1;

            int[] arr = new int[n];

            for (int i = 0; i < n ; i++)
            {
                arr[i] = i + start;
            }

            int sum = arr.Sum();

            string[] numbers = arr.Select(x => x.ToString()).ToArray();

            string answer = string.Join(" ", numbers.ToArray());

            Console.WriteLine(answer);
            Console.WriteLine($"Sum: {sum}");
        }
    }
}