Determination of delay

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

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Stew> stews = new List<Stew>();
            int yearToday = 2021;
            Console.WriteLine($"Сейчас идет {yearToday} год");

            for (int i = 0; i < 10; i++)
            {
                stews.Add(new Stew(yearToday));
            }
            Console.WriteLine("Вся тушенка: \n");

            foreach (var stew in stews)
            {
                stew.ShowInfo();
            }
            Console.WriteLine("\nПросроченная тушенка:\n");
            var expiredStew = stews.Where(stew => stew.ShelfLife < yearToday);

            foreach (var stew in expiredStew)
            {
                stew.ShowInfo();
            }
        }
    }

    class Stew
    {
        public int ShelfLife => _productionYear + _durationShelfLife;

        private string _name;
        private int _productionYear;
        private int _durationShelfLife = 5;

        public Stew(int yearToday)
        {
            Random random = new Random();
            List<string> names = new List<string> { "Йошкар-Олинский", "Честный продукт", "БАРС", "ГРОДФУД" };
            _name = names[random.Next(0, names.Count)];
            _productionYear = random.Next(2010, yearToday);
        }

        public void ShowInfo()
        {
            Console.WriteLine($"Название: {_name} || Год выпуска: {_productionYear} || Срок годности до: {ShelfLife}");
        }
    }
}