Matrix is identity matrix or not?

Following code has some more features as... User would be able to matrix of any order, presence of break condition, without using GOTO) 

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

namespace ConsoleApplication1
{
    class Program
    {
        public static void Main()
        {

            Console.WriteLine("Enter the order: ");

            int n = int.Parse(Console.ReadLine());

            int[,] a = new int[n, n];

            int i, j;

            Console.WriteLine("\n Enter the matrix\n");

            for (i = 0; i < n; i++)
            {
                int num = 0;
                for (j = 0; j < n; j++)
                {
                    Console.WriteLine("Enter [" + (i+1) + ","+ (j+1) + "] element: " );
                    if (Int32.TryParse(Console.ReadLine(), out num))
                    {
                        a[i, j] = num;
                    }
                }
            }

            Console.WriteLine("Entered Matrix is as folowing:\n");

            for (i = 0; i < n; i++)
            {
                for (j = 0; j < n; j++)
                {
                    Console.Write(a[i, j] + "\t");
                }
                Console.WriteLine();
            }

            bool IsIdentity = false;

            // Iterating all the elements of the given matrix
            for (i = 0; i < n; i++)
            {
                for (j = 0; j < n; j++)
                {
                    // Each Diagonal element should be 1 and all other elements should be 0
                    if ((i == j && a[i, j] == 1) || (i != j && a[i, j] == 0))
                    {
                        IsIdentity = true;
                    }
                    else
                    {
                        IsIdentity = false;
                        break;
                    }
                }
            }

            // After iterating all elemnts of the matrix, checking the IsIdentity flag
            if (IsIdentity == true)
            {
                Console.WriteLine("\nIt is an Identity Matrix");
            }
            else
            {
                Console.WriteLine("\nNot an Identity Matrix");
            }
          
            Console.ReadLine();
        }
    }
}

Hi,
Following is the program to verify whether a given matrix is identity or not :-