Programming Example of multi dimensional array in C#

using System;
 
namespace multi_dimensional_array
{
  class Program
   {
     static void Main(string[] args)
      {
        int i, j;
        //Declaring multi dimensional array
        string[,] Books = new string[3,3];
        for (i = 0; i < 3; i++)
         {
           for (j = 0; j < 3; j++)
            {
              Console.Write("\nEnter Book Name for {0}.                   Row and {1}. column:\t",i+1,j+1);
              Books[i,j] = Console.ReadLine();
            }
         }
 
        Console.WriteLine("\n\n=========================");
        Console.WriteLine("All the element of Books array            is:\n\n");
 
        //Formatting Output
        Console.Write("\t1\t2\t3\n\n");
        //outer loop for accessing rows
        for (i = 0; i < 3; i++)
         {
           Console.Write("{0}.\t", i + 1);
 
           //inner or nested loop for accessing column                of each row
           for (j = 0; j < 3; j++)
            {
              Console.Write("{0}\t", Books[i,j]);
            }
           Console.Write("\n");
         }
        Console.WriteLine("\n\n=========================");
        Console.ReadLine();
      }
   }
}