Food

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

namespace ConsoleApp24
{
    class Program
    {
        static void Main(string[] args)
        {
            bool exit = false;
            int presentYear = 2020;
            List<CannedFood> cannedFoods = new List<CannedFood>();
            CreateFoods(cannedFoods, presentYear);
            while(exit == false)
            {
                Console.Clear();
                Console.WriteLine($"Текущий год: {presentYear} \nПоказать список продуктов на складе - нажмите 1\nВывести список непросроченных продуктов - нажмите 2\nДля выхода - нажмите 3");
                bool correctInput = Int32.TryParse(Console.ReadLine(), out int resultInput);
                if (correctInput)
                {
                    switch (resultInput)
                    {
                        case 1:
                            ShowProducts(cannedFoods);
                            break;
                        case 2:
                            var freshProducts = cannedFoods.Where(cannedfood => cannedfood.YearOfManufacture + cannedfood.ProductShelfLife >= presentYear);
                            ShowProducts(freshProducts);
                            break;
                        case 3:
                            exit = true;
                            break;
                        default:
                            Error();
                            break;
                    }
                }
                else
                    Error();
            }
        }

        static void CreateFoods(List<CannedFood> cannedFoods, int presentyear)
        {
            Random randomYear = new Random();
            for (int i = 0; i < 10; i++)
            {
                cannedFoods.Add(new CannedMeat(randomYear.Next(presentyear - 10, presentyear)));
                cannedFoods.Add(new CannedFish(randomYear.Next(presentyear - 10, presentyear)));
            }
        }

        static void ShowProducts(IEnumerable<CannedFood> filterResult)
        {
            foreach (var product in filterResult)
            {
                product.ShowProduct();
            }
            Console.ReadKey();
        }

        static void Error()
        {
            Console.WriteLine($"Вы ввели неверную команду или число - попробуйте еще раз.");
            Console.ReadKey();
        }
    }

    class CannedFood
    {
        public string Name { get; private set; }
        public int YearOfManufacture { get; private set; }
        public int ProductShelfLife { get; private set; }
        public CannedFood(string name, int yearOfManufacture, int productShelfLife)
        {
            Name = name;
            YearOfManufacture = yearOfManufacture;
            ProductShelfLife = productShelfLife;
        }

        public void ShowProduct()
        {
            Console.WriteLine($"Наименование консервы: {Name} | Год производства: {YearOfManufacture} | Срок годности: {ProductShelfLife} года");
        }

    }

    class CannedMeat : CannedFood
    {
        static private string _name = "Тущенка";
        static private int _productShelfLife = 6;
        public CannedMeat(int yearOfManufacture) : base(_name, yearOfManufacture, _productShelfLife) { }
    }

    class CannedFish : CannedFood
    {
        static private string _name = "Консервы";
        static private int _productShelfLife = 3;
        public CannedFish(int yearOfManufacture) : base(_name, yearOfManufacture, _productShelfLife) { }
    }
}