13_3(Main.cs)

using System;
using System.Text;
using System.IO;

namespace program
{
    class Program
    {
        static public Publish[] Input()
        {
            using (StreamReader fileIn = new StreamReader("base.txt"))
            {
                int n = int.Parse(fileIn.ReadLine());
                Publish[] ar = new Publish[n];

                for (int i = 0; i < n; i++)
                {
                    string[] text = fileIn.ReadLine().Split(' ');
                    if (text[0] == "Book")
                        ar[i] = new Book(text[1], text[2], Int32.Parse(text[3]), text[4]);
                    else if (text[0] == "Article")
                        ar[i] = new Article(text[1], text[2], Int32.Parse(text[3]), text[4], Int32.Parse(text[5]));
                    else if (text[0] == "ElecResource")
                        ar[i] = new ElecResource(text[1], text[2], text[3], text[4]);
                }
                return ar;
            }
        }

        public static void Main(string[] args)
        {
            Publish[] arr = Input();
            Console.WriteLine("Все издания: \n");
            for(int i = 0; i < arr.Length; i++){
                arr[i].displayInfo();
                Console.WriteLine();
            }

            Array.Sort(arr);
            Console.WriteLine("Все издания после сортировки: \n");
            for(int i = 0; i < arr.Length; i++){
                arr[i].displayInfo();
                Console.WriteLine();
            }
        }
    }
}