GameOfLifeAnnotated

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

namespace GameOfLife
{
    class Program
    {
        /// <summary>
        /// Function recieves board and a copy of the board and starts a new cycle of the game.
        /// </summary>
        /// <param name="arr">The board</param>
        /// <param name="copy">The copy of the board</param>
        public static void UpdateBoard(int[,] arr, int[,] copy)
        {
            for (int i = 1; i < arr.GetLength(0) - 1; i++)
            {
                for (int k = 1; k < arr.GetLength(1) - 1; k++)
                    UpdateCell(arr, i, k, copy);
            }
        }
        /// <summary>
        /// Function
        /// </summary>
        /// <param name="arr"></param>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <param name="copy"></param>
        public static void UpdateCell(int[,] arr, int a, int b, int[,] copy)
        {
            int neihbors = CountNeighbors(arr, a, b);
            switch (neihbors)
            {
                case 0:
                case 1:
                    copy[a, b] = 0;
                    break;
                case 2:
                    break;
                case 3:
                    if (arr[a, b] == 0)
                        copy[a, b] = 1;
                    break;
                default:
                    copy[a, b] = 0;
                    break;
            }
        }
        public static int CountNeighbors(int[,] arr, int a, int b)
        {
            int count = 0;
            if (arr[a, b] == 1)
                count--;
            for (int i = a - 1; i < a + 2; i++)
            {
                for (int k = b - 1; k < b + 2; k++)
                {
                    count += (arr[i, k] + Math.Abs(arr[i, k])) / 2;
                }
            }
            return count;
        }
        public static void InitializeArray(int[,] arr)
        {
            for (int i = 0; i < arr.GetLength(0); i += arr.GetLength(0) - 1)
                for (int k = 0; k < arr.GetLength(1); k++)
                    arr[i, k] = -1;
            for (int i = 0; i < arr.GetLength(1); i += arr.GetLength(1) - 1)
                for (int k = 0; k < arr.GetLength(0); k++)
                    arr[k, i] = -1;
            for (int i = 1; i < arr.GetLength(0) - 1; i++)
            {
                for (int k = 1; k < arr.GetLength(1) - 1; k++)
                    arr[i, k] = int.Parse(Console.ReadLine());
            }
        }
        public static void RandomSetup(int[,] arr)
        {
            Random rnd = new Random();
            for (int i = 0; i < arr.GetLength(0); i += arr.GetLength(0) - 1)
                for (int k = 0; k < arr.GetLength(1); k++)
                    arr[i, k] = -1;
            for (int i = 0; i < arr.GetLength(1); i += arr.GetLength(1) - 1)
                for (int k = 0; k < arr.GetLength(0); k++)
                    arr[k, i] = -1;
            for (int i = 1; i < arr.GetLength(0) - 1; i++)
            {
                for (int k = 1; k < arr.GetLength(1) - 1; k++)
                {
                    arr[i, k] = rnd.Next(0, 2);
                    for (int m = 0; m < rnd.Next(1, 3); m++)
                    {
                        if (arr[i, k] == 1)
                            arr[i, k] = rnd.Next(0, 2);
                    }
                }
            }
        }
        public static void CopyBoard(int[,] original, int[,] copy)
        {
            for (int i = 0; i < original.GetLength(0); i++)
            {
                for (int k = 0; k < original.GetLength(1); k++)
                    copy[i, k] = original[i, k];
            }
        }
        public static void Print(int[,] arr)
        {
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int k = 0; k < arr.GetLength(1); k++)
                {
                    switch (arr[i, k])
                    {
                        case 1:
                            //Console.Write("▀");
                            Console.Write("♦");
                            break;
                        case 0:
                            Console.Write(" ");
                            break;
                        default:
                            Console.Write(" ");
                            break;
                    }
                }
                Console.WriteLine();
            }
        }
        public static bool GameOver(int[,] board)
        {
            for (int i = 0; i < board.GetLength(0); i++)
            {
                for (int k = 0; k < board.GetLength(1); k++)
                    if (board[i, k] == 1)
                        return false;
            }
            return true;
        }
        public static bool StandStill(int[,] board, int[,] lastBoard)
        {
            for (int i = 0; i < board.GetLength(0); i++)
            {
                for (int k = 0; k < board.GetLength(1); k++)
                {
                    if (board[i, k] != lastBoard[i, k])
                        return false;
                }
            }
            return true;
        }
        static void Main(string[] args)
        {
            char playAgain = 'y';
            int[,] gameBoard = new int[15, 65];
            int[,] boardCopy = new int[gameBoard.GetLength(0), gameBoard.GetLength(1)];
            while (playAgain.ToString().ToLower().Equals("y"))
            {
                RandomSetup(gameBoard);
                CopyBoard(gameBoard, boardCopy);
                do
                {
                    CopyBoard(boardCopy, gameBoard);
                    Print(gameBoard);
                    UpdateBoard(gameBoard, boardCopy);
                    System.Threading.Thread.Sleep(400);
                    Console.Clear();
                }
                while (!GameOver(gameBoard) && !StandStill(boardCopy, gameBoard));
                if (GameOver(gameBoard))
                    Console.WriteLine("Congratulations, you won!");
                else
                    Console.WriteLine("You lose!");
                Console.WriteLine("Play again? y/n");
                playAgain = char.Parse(Console.ReadLine());
                Console.Clear();
            }
        }
    }
}