Tushenka

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

namespace Tushenka
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Stew> stewCans = new List<Stew>
            {new Stew ("Tuhlyatina",1996,2000),
             new Stew ("Fresh",2020,2025),
             new Stew ("Beef",2020,2024),
             new Stew ("Pork",1999,2007),
             new Stew ("Rossiyskaya",2011,2019),
             new Stew ("Sovetskaya",2003,2029),
             new Stew ("Luchshaya",2014,2069),
             new Stew ("Normalnaya",2017,2023),
             new Stew ("Posredstvennaya",1917,1939),
             new Stew ("Obychnaya",2019,2024),
            };

            var expiredStew = from Stew stew in stewCans
                              where stew.ExpirationDate < 2020
                              select stew;
            foreach (var stew in expiredStew)
            {
                Console.WriteLine(stew.Name);
            }
        }

        class Stew
        {
            public string Name { get; private set; }
            public int ManufactureDate { get; private set; }
            public int ExpirationDate { get; private set; }

            public Stew(string name, int manufactureDate, int expirationDate)
            {
                Name = name;
                ManufactureDate = manufactureDate;
                ExpirationDate = expirationDate;
            }
        }
    }
}