gistfile1.txt

using System;

namespace HW_02
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int minLines = 10;
            int maxLines = 20;
            int minColums = 10;
            int maxColums = 20;
            int minValueOfNumber = 100;
            int maxValueOfNumber = 1000;

            int maxNumber = 0;

            int lines = new Random().Next(minLines, maxLines);
            int columns = new Random().Next(minColums, maxColums);  

            Random randomNumber = new Random();

            int[,] array = new int[lines, columns];
            
            for (int i = 0; i < lines; i++)
            {
                for (int j = 0; j < columns; j++)
                {
                    array[i, j] = randomNumber.Next(minValueOfNumber, maxValueOfNumber);
                }
            }

            Console.WriteLine("Массив\n");

            for (int i = 0; i < lines; i++)
            {
                for (int j = 0; j < columns; j++)
                {
                    Console.Write(array[i, j] + " ");
                }

                Console.WriteLine();
            }

            for (int i = 0;i < lines; i++)
            {
                for(int j = 0;j < columns; j++)
                {
                    if(array[i, j] > maxNumber) 
                        maxNumber = array[i, j];
                }
            }

            Console.WriteLine($"\nМаксимальное число в массиве: {maxNumber}");
        }
    }
}