C#_3_work_by_specific_column_and_field

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

namespace C_Ijun
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int[,] twoSizeArray = new int[4, 4];
            int rowSum = 0;
            int colMult = 1;
            int lowRangeRandom = 0;
            int highRangeRandom = 10;
            int arrayIndBySum = 2;
            int arrayIndByMulti = 1;

            Random random = new Random();

            for (int i = 0; i < twoSizeArray.GetLength(0); i++)
            {
                for (int j = 0; j < twoSizeArray.GetLength(1); j++)
                {
                    twoSizeArray[i, j] = random.Next(lowRangeRandom, highRangeRandom);
                }
            }

            for (int i = 0; i < twoSizeArray.GetLength(0); i++)
            {
                for (int j = 0; j < twoSizeArray.GetLength(1); j++)
                {
                    Console.Write(twoSizeArray[i, j] + " ");
                }

                Console.WriteLine();
            }

            for (int j = 0; j < twoSizeArray.GetLength(1); j++)
            {
                rowSum += twoSizeArray[arrayIndBySum - 1, j];
            }

            for (int i = 0; i < twoSizeArray.GetLength(0); i++)
            {
                colMult *= twoSizeArray[i, arrayIndByMulti - 1];
            }

            Console.WriteLine($"Сумма чисел строки {arrayIndBySum} - {rowSum}");
            Console.WriteLine($"Произведение чисел столбца {arrayIndByMulti} - {colMult}");
            Console.ReadKey();
        }
    }
}