Jogo da velha

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using System.ComponentModel;
using Windows.Phone.UI.Input;
using Windows.UI.Popups;

namespace teste_Jogo_da_velha
{
    public sealed partial class MainPage : Page, INotifyPropertyChanged
    {
        private Button[] _buttonArray;
        private bool _isX;          // to determine if X or O is current character
        private bool _isGameOver;   // if the game is over
        private string _jogador = "X";
        public string Jogador
        {
            get { return _jogador; }
            set
            {
                if (_jogador != value)
                {
                    _jogador = value;
                    NotifyPropertyChanged("Jogador");
                }
            }
        }
        public MainPage()
        {
            this.InitializeComponent();
            this.NavigationCacheMode = NavigationCacheMode.Required;
            Loaded += MainPage_Loaded;
            HardwareButtons.BackPressed += HardwareButtons_BackPressed;
        }

        private void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e)
        {
            e.Handled = true;
            if (Frame.CanGoBack)
            {
                Frame.GoBack();
            }
            else
            {
                Application.Current.Exit();
            }
        }

        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            _buttonArray = new Button[9] { but1, but2, but3, but4, but5, but6, but7, but8, but9 };

            for (int i = 0; i < 9; i++)
                this._buttonArray[i].Click += ClickHandler;

            InitTicTacToe();  // set the defaults
        }

        private void ClickHandler(object sender, RoutedEventArgs e)
        {
            var obj = sender as Button;
            var content = obj.Content;

            if (this._isGameOver)
            {
                lblResultado.Visibility = Windows.UI.Xaml.Visibility.Visible;
                lblResultado.Text = "Parabéns jogador " + Jogador + " você venceu!";
                return;
            }
            if (_isX)   // put the character in the Text property
            {
                obj.Content = "X";
                obj.IsEnabled = false;
                Jogador = "0";
            }
            else
            {
                obj.Content = "O";
                obj.IsEnabled = false;
                Jogador = "X";
            }

            _isX = !_isX;   // prepare for next character

            this._isGameOver = TicTacToeUtils.CheckAndProcessWinner(_buttonArray);

        }
        public async void MessageBoxDisplay(string content)
        {
            //Creating instance for the MessageDialog Class
            //and passing the message in it's Constructor
            MessageDialog msgbox = new MessageDialog(content);
            //Calling the Show method of MessageDialog class
            //which will show the MessageBox
            await msgbox.ShowAsync();
        }


    private void InitTicTacToe()
        {
            for (int i = 0; i < 9; i++)
            {
                _buttonArray[i].Content = " ";
                _buttonArray[i].Background = new SolidColorBrush(Colors.Transparent);
                _buttonArray[i].IsEnabled = true;
            }
            this._isX = true;
            Jogador = "X";
            lblResultado.Visibility = Visibility.Collapsed;
            this._isGameOver = false;
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (null != handler)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        private void butPlay_Click(object sender, RoutedEventArgs e)
        {
            //MessageBoxDisplay(((Button)sender).Content.ToString());
            InitTicTacToe();
        }
    }
    public class TicTacToeUtils
    {
        static MainPage mp;
        // Winners contains all the array locations of
        // the winning combination -- if they are all
        // either X or O (and not blank)
        static private int[,] Winners = new int[,]
                   {
                        {0,1,2},
                        {3,4,5},
                        {6,7,8},
                        {0,3,6},
                        {1,4,7},
                        {2,5,8},
                        {0,4,8},
                        {2,4,6}
                   };

        //--------------------------------------------------------------
        // CheckAndProcessWinner determines if either X or O has won.
        // Once a winner has been determined, play stops.
        //--------------------------------------------------------------
        static public bool CheckAndProcessWinner(Button[] myControls)
        {
            bool gameOver = false;
            for (int i = 0; i < 8; i++)
            {
                int a = Winners[i, 0], b = Winners[i, 1], c = Winners[i, 2];   //get the indices of the winners

                //Button b1 = myControls[a], b2 = myControls[b], b3 = myControls[c];// just to make the
                var obj1 = myControls[a] as Button;
                var obj2 = myControls[b] as Button;
                var obj3 = myControls[c] as Button;

                // the code readable

                if (obj1.Content.ToString() == " " || obj2.Content.ToString() == " " || obj3.Content.ToString() == " ")    // any of the squares blank
                    continue;                                           // try another -- no need to go further

                if (obj1.Content.ToString() == obj2.Content.ToString() && obj2.Content.ToString() == obj3.Content.ToString()) // are they the same?
                {                                                       // if so, they WIN!
                    obj1.Foreground = obj2.Foreground = obj3.Foreground = obj3.Foreground = new SolidColorBrush(Colors.LimeGreen);
                    gameOver = true;
                    foreach (Button item in myControls)
                    {
                        item.IsEnabled = false;
                    }
                    break;  // don't bother to continue
                }
            }
            return gameOver;
        }
    }
}