مربع جادویی

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

namespace Magic_Square
{
    class Program
    {
        static void Main(string[] args)
        {

            int z, x, i, j, k, nsqr, n, range, ix;
            int[,] a1 = new int[100, 100];
            int[,] a2 = new int[100, 100];
            int[,] matrix = new int[100, 100];


            Console.WriteLine("Enter n:");

            n = Convert.ToInt32(Console.ReadLine());

            i = 0;
            j = n / 2;
            k = 1;
            nsqr = n * n;

            if (n % 2 == 0)
            {
                while (k <= nsqr)
                {
                    matrix[j] = k;
                    j++;
                    i--;
                    if (k % n == 0)
                    {
                        i += 2;
                        j--;
                    }//end if
                    else
                    {
                        if (j == n) j -= n;
                        else if (i < 0) i += n;
                    }//end else
                    k++;
                }//end while
            }//end if
            else
            {
                ix = 1;
                for (i = 0; i < n; i++)
                    for (j = 0; j < n; j++)
                    {
                        a1[j] = ((i + 1) % 4) / 2;
                        a2[j] = ((i + 1) % 4) / 2;
                        matrix[j] = ix;
                        ix++;
                    }//end for
                for (i = 0; i < n; i++)

                    for (j = 0; j < n; j++)

                        if (a1[j] == a2[i,j])

                            matrix[j] = n * n + 1 - matrix[j];

            }//end else

            Console.WriteLine("*** Magic___Square: *** ");

            for (z = 0; z < n; z++)
            {
                for (x = 0; x < n; x++)

                    Console.WriteLine(matrix[z,x] );
                  Console.WriteLine(" ");

                Console.WriteLine("");
            }//end for
            Console.ReadKey();

        }
    }
}