files

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;

namespace lab4
{
    class Program

    {
        static int n = 0;
        static private Random rnd = new Random();
        static  List <int> list = new List<int>();
        static List<int> list_f = new List<int>();
        static int[,] arr = new int[40, 40];


        static void Write_(FileStream f)
        {
            try
            {
                using (f)
                {
                    using (BinaryWriter fout = new BinaryWriter(f))
                    {


                        Console.WriteLine("Исходный файл:");
                        int a;
                        int n = rnd.Next(5, 20);
                        for (int i = 1; i <= n; i++)
                        {



                            a = rnd.Next(-10, 10);
                            Console.Write(a + " ");
                            fout.Write(a);
                        }

                    }

                }
            }
            catch(IOException e)
            {
                Console.WriteLine("Error:" + e.Message);
                return;
            }

        }
        static void Read_(FileStream f)
        {
            int a;

            try
            {
                using (f)
                {
                    using (BinaryReader F = new BinaryReader(f))
                    {
                        for (; F.BaseStream.Position < F.BaseStream.Length;)
                        {
                            a = F.ReadInt32();

                            list.Add(a);

                        }

                    }

                }
            }
            catch (FileNotFoundException e)
            {
                Console.WriteLine("Проверьте правильность имени файла" + e.Message);
                return;
            }
            catch (Exception e)
            {
                Console.WriteLine("Error:" + e.Message);
                return;
            }

        }
        static void Save(string fileName)
        {
            BinaryFormatter bf = new BinaryFormatter();
            using (Stream writer = new FileStream(fileName, FileMode.Create))
            {
                bf.Serialize(writer, list);
            }
        }
        static void Load(string fileName)
        {
            BinaryFormatter bf = new BinaryFormatter();
            using (Stream reader = new FileStream(fileName, FileMode.Open))
            {
                list_f = (List<int>)bf.Deserialize(reader);
            }
        }
        static void inp()
        {
            string buf;
            Console.WriteLine();
            Console.WriteLine("Введите n");
            buf = Console.ReadLine();
            n = int.Parse(buf);
            int k = 0;
            for (int i=0; i< n; i++)
            {
                for (int j=0; j<n; j++)
                {
                    if (k <= list_f.Count - 1)
                        arr[i, j] = list[k];
                    else break;
                    k++;
                }
            }
        }
        static void out1(int[,] arr) //вывод массива
        {
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    Console.Write("{0}\t", arr[i, j]);
                }
                Console.WriteLine();
            }
        }
        static int find(int [] max_, int str)
        {
            for (int i = 0; i < str; i++)
            {

                for (int j = 0; j < n; j++)
                {


                    max_[i] *= arr[i,j];
                }

            }
            Console.WriteLine();
            for (int i = 0; i < str; i++)

                    Console.WriteLine(max_[i]);

            int max = Array.IndexOf(max_, max_.Max());
            return max;
        }
        static void reverse(int rez)
        {
            for (int i = 0; i < n; i++)
            {

                for (int j = 0; j < n; j++)
                {


                    arr[i,j] = arr[rez, j];
                }

            }
        }

        static void Main(string[] args)
        {
            FileStream f = new FileStream("test.dat", FileMode.Create);
            Write_(f);
            FileStream f1 = new FileStream("test.dat", FileMode.Open);

            Read_(f1);
            var uniq = list.Distinct();
            list = uniq.ToList();

            Save("finish.dat");
            Load("finish.dat");
            Console.WriteLine();
             foreach (var item in list_f)
             {
                 Console.Write(item + " ");
             }
            inp();
            out1(arr);
            int str;

             str = list_f.Count / n;

            Console.WriteLine();
            Console.WriteLine("Количество заполненных строк " + str);
            int[] max_ = new int[str];
            for (int i = 0; i < str; i++)
            {
                max_[i] = 1;
            }

            int rez =find(max_, str);
            reverse(rez);
            Console.WriteLine();
            out1(arr);


        }
    }
}