Matrix rectangle best sum

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] matrix = { { 0, 2, 4, 0, 9, 5 },
                            { 7, 1, 3, 3, 2, 1 },
                            { 1, 3, 9, 8, 5, 6 },
                            { 4, 6, 7, 9, 1, 0 } };
            int bestSum = int.MinValue;// helpful variables
            int bestRow = 0;
            int bestCol = 0;
            for (int row = 0; row < matrix.GetLength(0) - 1; row++)// go trough the matrix first rows then cols
            {
                for (int col = 0; col < matrix.GetLength(1) - 1; col++)
                {
                    int sum = matrix[row, col] + matrix[row, col + 1] + matrix[row + 1, col] + matrix[row + 1, col + 1];//these cells could form a rectangle
                    if (bestSum < sum)
                    {
                        bestSum = sum;
                        bestRow = row;
                        bestCol = col;
                    }
                }
            }
            Console.WriteLine("The best platform is:");
            Console.WriteLine(" {0}{1}", matrix[bestRow, bestCol], matrix[bestRow, bestCol + 1]);
            Console.WriteLine(" {0}{1}", matrix[bestRow + 1, bestCol], matrix[bestRow + 1, bestCol + 1]);// print them like a matrix
            Console.WriteLine("The maximal sum is: {0}", bestSum);// show the best sum
        }
    }
}