ЯПлаба5_2

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

namespace Charp2_1
{

    public class Pok
    {
        private int by { get; set; }
        private DateTime date { get; set; }
        private string marka { get; set; }
        private string color { get; set; }
        private int sum { get; set;}

        public Pok(int by, DateTime date, string marka, string color, int sum)
        {
            this.by = by;
            this.date = date;
            this.marka = marka;
            this.color = color;
            this.sum = sum;
        }
        public int Sum()
        {
            return this.sum;
        }
        public void Print()
        {
            Console.WriteLine("Номер ВУ: "+this.by+" Дата "+ this.date+ " Марка "+this.marka+" Цвет "+this.color+" Цена "+this.sum);
        }
        public int printBY()
    {
        return this.by;
    }
    }
    class Program
    {
        static void Main()
        {
            StreamReader f = File.OpenText("./Input.txt");
            Pok[] a = new Pok[5];
            for (int i = 0; i < 5; i++)
            {
                string s,s2,s3;
                int a1,a2;
                int b1,b2,b3;
                s = f.ReadLine();
                a1 = Convert.ToInt32(s.Split(' ')[0]);
                b1 = Convert.ToInt32(s.Split(' ')[1]);
                b2 = Convert.ToInt32(s.Split(' ')[2]);
                b3 = Convert.ToInt32(s.Split(' ')[3]);
                s2 = s.Split(' ')[4];
                s3=s.Split(' ')[5];
                a2 = Convert.ToInt32(s.Split(' ')[6]);
                DateTime bb = new DateTime(b3, b2, b1);
                a[i] = new Pok(a1, bb, s2, s3, a2);
                a[i].Print();
            }

            Console.WriteLine(" ");
            max(a); Console.WriteLine(" ");
            Fullsum(a);
            Console.WriteLine(" ");

        }
        static void Fullsum(Pok[] a)
        {
            int sum = 0;
            for (int i=0; i<5; i++)
            {
                sum += a[i].Sum();
            }
            Console.WriteLine("Сумма всех покупок " + sum);
        }

        static void max(Pok[] a)
        {
            int m = 0, j=0;
            for (int i = 0; i < 5; i++)
            {
                if (m < a[i].Sum()) { m = a[i].Sum(); j = i; }
            }
           Console.WriteLine("Номер ВУ самого дорогого "+ a[j].printBY());

        }

    }
}