//Define the Game Object.

//The Game class (object) represents the Originator component that generates the application data.
//The Game class (object) invokes the Save() and Restore() methods of the Memento class (object).
[Serializable]
public class Game
{
private char[] _mBoard = { 'X', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
public char Player { get; set; }

public Game()
{
Player = 'X';
}

public void Play(int pos)
{
_mBoard[pos] = Player;

if (Player == 'X')
{
Player = 'O';
}
else
{
Player = 'X';
}

_mBoard[0] = Player;
}

public Memento Save()
{
Memento memento = new Memento();

return memento.Save(_mBoard);
}

public void Restore(Memento memento)
{
_mBoard = (char[]) memento.Restore();
Player = _mBoard[0];
}

public void DisplayBoard()
{
Console.WriteLine();
for (int i = 1; i <= 9; i += 3)
{
Console.WriteLine("{0} | {1} | {2}", _mBoard[i], _mBoard[i + 1], _mBoard[i + 2]);
if (i < 6)
Console.WriteLine("---------");
}
}
}