Problem 2. Метод Insert

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

namespace AlgorithmsOverStructureData
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine(); //2 3 4 5 6 7 1
            List<int> startNumbers = input.Split(" ").Select(int.Parse).ToList();
            int number = int.Parse(Console.ReadLine());
            Console.WriteLine("Start array numbers: " + string.Join(", ", startNumbers));

            startNumbers.Add(number);
            startNumbers.Sort();
            List<int> sortedNumbers = startNumbers;
            Console.WriteLine("End array numbers: " + string.Join(", ", sortedNumbers));



        }
    }
}