bagrut 2010-9 bidimensional array

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//                                                 Arr.GetLength(0) - gets the length of the first dimension. Arr.GetLength(1) - gets the length of the second dimension. Arr.Length - gets the length of all objects. (Dimension A * Dimension B)
namespace Bagrut2010_Targil9
{
    class Program
    {
        static void Main(string[] args)
        {
            int SameDiagonals=0;
            int[,] Arr = new int[4, 4];
                Console.WriteLine(Arr.Length);
                Random rand = new Random();          // Not requested in the exam, just for testing purposes
                for (int a = 0; a < Arr.GetLength(0); a++)                   // ^
                {                                              // ^
                    for (int b = 0; b < Arr.GetLength(1); b++)               // ^
                    {                                          // ^
                        Arr[a, b] = rand.Next(0, 2);           // ^
                        Console.Write("{0,6}", Arr[a, b]);               // ^
                    }                                          // ^
                    Console.WriteLine(); Console.WriteLine();  // ^
                }

                for (int i = 0; i < Arr.GetLength(0); i++)
                {
                    for (int p = 0; p < Arr.GetLength(1); p++)
                    {
                        if (IsExist(Arr, i, p) == true)
                        {
                            if (IsSame(Arr, i, p) == true)
                                SameDiagonals++;
                        }
                    }
                }
                Console.WriteLine("There are " + SameDiagonals + " diagonls whose length is 3 and are equal to 1.");

        }
        static bool IsExist(int[,] Arr,int x, int y)  // x=horizontal row   y=vertical column INDEXES
        { // 36x52 : 36 rows and 52 columns
            if (x <=Arr.GetLength(0) - 3 &&y <=Arr.GetLength(1) - 3)
                return true;
            else return false;
        }
        static bool IsSame(int[,] array, int x, int y)
        {
            if (IsExist(array,x, y) == true)
            {
                if(array[x,y]==1&&array[x+1,y+1]==1&&array[x+2,y+2]==1)
                    return true;
                else return false;
            }
            else return false;
        }
    }
}