حل مربع جادویی به روش دیگر...با ما باشید

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            {
    int[,]a=new int[10,10];
     int i,j,n,k=1;
   
    Console.WriteLine("*** Please Enter The Number Between 0 to 9 ***");
    n=Convert.ToInt32(Console.ReadLine());
    if(n%2==0 ||n>9)
    {
        Console.WriteLine("\n\n***The Given Number is Not Acceptable!,Try Again ***");
        Console.ReadKey();
        Environment.Exit(1);     
    }
    else
    {
        for (i=0;i<=n;i++)
            for (j=0;j<=n;j++)
                a[i,j]=0;
        j=(n/2)+1;
        i=1;
        a[i,j]=k;

        for(k=2;k<=(n*n);k++)
        {
            i=i-1;
            j=j-1;
            if((i==0 &&j==0)||(a[i,j]!=0))
            {
                i=i+2;
                j=j+1;
            }
            else
            {
                if(i==0)
                    i=n;
                else if(j==0)
                    j=n;
            }
            a[i,j]=k;
        }
    }
    Console.WriteLine("\n\n");
    for (i=1;i<=n;i++)
    {
        for (j=1;j<=n;j++)
       Console.WriteLine("\t",a[i,j]);
      
        Console.WriteLine("\n\n");
    }
    Console.ReadKey();
}

        }
    }
}