matrix

using System;
using System.Collections.Generic;

namespace MatrixAssignment
{
    class Matrix
    {
        public static int[,] CreateGrid(int rows, int cols)
        {
            int[,] grid = new int[rows, cols];
            int cells = grid.GetLength(0) * grid.GetLength(1);
            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    Console.WriteLine("Enter you number for cell {0}", cells);
                    grid[row, col] = int.Parse(Console.ReadLine());
                    cells--;
                }
            }
            return grid;
        }

        public static void PopulateGrid(int[,] grid)
        {
            Console.WriteLine("\n Here is the Grid");
            for (int row = 0; row < grid.GetLength(0); row++ )
            {
                for (int col = 0; col < grid.GetLength(1); col++)
                {
                    Console.Write(grid[row, col] + " ");  
                }
                Console.WriteLine();
            }
        }

        public static void CalculateMatrix(int [,] grid1, int [,] grid2, int rows, int cols)
        {
            int[,] grid3 = new int[rows, cols];

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    grid3[row, col] = grid1[row, col] + grid2[row, col];
                }
            }

            for (int row = 0; row < grid3.GetLength(0); row++)
            {
                for (int col = 0; col < grid3.GetLength(1); col++)
                {
                    Console.Write(grid3[row, col] + " ");
                }
                Console.WriteLine();
            }
        }
    }
}

program

using System.Text;
using System.Threading.Tasks;

namespace MatrixAssignment
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("How many rows would you like?");
            int row = int.Parse(Console.ReadLine());
            Console.WriteLine("How many columns would you like?");
            int col = int.Parse(Console.ReadLine());
            
            int [,] grid1 = Matrix.CreateGrid(row, col);
            Matrix.PopulateGrid(grid1);

            Console.WriteLine("\n Now for the second Grid");
            int[,] grid2 = Matrix.CreateGrid(row, col);
            Matrix.PopulateGrid(grid2);

            Console.WriteLine("I am now going to add the 2 Grids together, Press return to continue....");
            Console.ReadLine();

            Matrix.CalculateMatrix(grid1, grid2, row, col);

        }
    }
}