using System;

​

namespace TicTacToe

{

    public class Program

    {

        public static string playerTurn = "X";

        public static string[][] board = new string[][]

        {

            new string[] {" ", " ", " "},

            new string[] {" ", " ", " "},

            new string[] {" ", " ", " "}

        };

​

        public static void Main()

        {

​

         Console.WriteLine("\n{0,50}", "*****************************************");

         Console.WriteLine("");

         Console.WriteLine("{0,45}", "Welcome to Tic-Tac-Toe game!");

         Console.WriteLine("");

​

         Console.WriteLine("{0,50}", "*****************************************");

         Console.WriteLine(""); 

         Console.WriteLine("");

​

​

​

            do

            {

                DrawBoard();

                GetInput();

​

            } 

            while (!CheckForWin() && !CheckForTie());

​

            // leave this command at the end so your program does not close automatically

            Console.ReadLine();

        }

​

        public static void GetInput()

        {

            Console.WriteLine("Player " + playerTurn);

            Console.Write("Enter Row:");

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

            Console.Write("Enter Column:");

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

            PlaceMark(row, column);

        }

​

        public static void PlaceMark(int row, int column)

        {

        // your code goes here

            board[row][column] = playerTurn; 

        }

​

​

        public static bool CheckForWin()

        {

            // your code goes here

            bool Winner = HorizontalWin() || VerticalWin() || DiagonalWin();

            if (Winner)

            {   

                Console.WriteLine("\n\tCongratulations! You have Won!");

            }

            else if (playerTurn == "X")

            {

                playerTurn = "O";

            }

            else  

            {

                playerTurn = "X";

            }

​

            return Winner;

        }

​

        public static bool CheckForTie()

        {

            // your code goes here

            bool Tie = false;

            if (board[0][0] != " " && board[0][1] != " " && board[0][2] != " " && board[1][0] != " " && board[1][1] != " " && board[1][2] != " " && board[2][0] != " " && board[2][1] != " " && board[2][2] != " ")

            {

                Tie = true;

                Console.WriteLine("\n\tIt's a tie! Press any Key to continue.");

            }

            return Tie;

        }

        public static bool HorizontalWin()

        {

        // your code goes here

            bool HorizontalWinner = false;

            if (board[0][0] == playerTurn && board[0][1] == playerTurn &&  board[0][2] == playerTurn)

            {

                HorizontalWinner = true;

            }

            if (board[1][0] == playerTurn && board[1][1] == playerTurn && board[1][2] == playerTurn)

            {

                HorizontalWinner = true;

            }

            if (board[2][0] == playerTurn && board[2][1] == playerTurn && board[2][2] == playerTurn)

            {

                HorizontalWinner = true;

            }

​

        return HorizontalWinner;

        }

​

        public static bool VerticalWin()

        {

            // your code goes here

            bool VerticalWinner = false;

            if (board[0][0] == playerTurn && board[1][0] == playerTurn && board[2][0] == playerTurn)

            {

                VerticalWinner = true;

            }

             if (board[0][1] == playerTurn && board[1][1] == playerTurn && board[2][1] == playerTurn)

            {

                VerticalWinner = true;

            }

             if (board[0][2] == playerTurn && board[1][2] == playerTurn && board[2][2] == playerTurn)

            {

                VerticalWinner = true;

            }

            return VerticalWinner;

        }

​

        public static bool DiagonalWin()

        {

            // your code goes here

            bool DiagonalWinner = false;

            if (board[0][0] == playerTurn && board[1][1] == playerTurn && board[2][2] == playerTurn)

            {

                DiagonalWinner = true;

            }

            if (board[0][2] == playerTurn && board[1][1] == playerTurn && board[2][0] == playerTurn)

            {

                DiagonalWinner = true;

            }

            return DiagonalWinner;

        }

​

        public static void DrawBoard()

        {

            Console.WriteLine("  0 1 2");

            Console.WriteLine("0 " + String.Join("|", board[0]));

            Console.WriteLine("  -----");

            Console.WriteLine("1 " + String.Join("|", board[1]));

            Console.WriteLine("  -----");

            Console.WriteLine("2 " + String.Join("|", board[2]));

        }

    }

}

​