5.Square with Maximum Sum

    using System;
    using System.ComponentModel;
    using System.Linq;
    using System.Runtime.CompilerServices;

    namespace _5._Square_with_Maximum_Sum
    {
        class Program
        {
            static void Main(string[] args)
            {
                int[] matrixSizes = ReadFromConsole();

                int rows = matrixSizes[0];
                int cols = matrixSizes[1];

                int[,] matrix = new int[rows, cols];

                FillMatrix(matrix, rows, cols);
                int maxSum = Int32.MinValue;
                int maxRow = 0;
                int maxCol = 0;

                for (int rowIndex = 0; rowIndex < rows - 1; rowIndex++)
                {
                    for (int colIndex = 0; colIndex < cols - 1; colIndex++)
                    {
                        int currentResult = 0;

                        currentResult = (matrix[rowIndex, colIndex] + matrix[rowIndex, colIndex + 1])
                               + (matrix[rowIndex + 1, colIndex] + matrix[rowIndex + 1, colIndex + 1]);
                        if (currentResult > maxSum)
                        {
                            maxSum = currentResult;
                            maxRow = rowIndex;
                            maxCol = colIndex;
                        }
                    }
                }

                Console.WriteLine($"{matrix[maxRow, maxCol]} {matrix[maxRow, maxCol + 1]}");
                Console.WriteLine($"{matrix[maxRow + 1, maxCol]} {matrix[maxRow + 1, maxCol + 1]}");
                Console.WriteLine(maxSum);
            }

            static void FillMatrix(int[,] matrix, int rows, int cols)
            {
                for (int row = 0; row < rows; row++)
                {
                    int[] numbersToFill = ReadFromConsole();
                    for (int col = 0; col < cols; col++)
                    {
                        matrix[row, col] = numbersToFill[col];
                    }
                }

            }

            public static int[] ReadFromConsole()
            {
                int[] matrixSizes = Console.ReadLine()
                    .Split(", ", StringSplitOptions.RemoveEmptyEntries)
                    .Select(int.Parse)
                    .ToArray();
                return matrixSizes;
            }
        }
    }