TicTacToe (WPF Logic)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace TicTacToe
{
    public enum ButtonState
        {
            empty, //0
            O, //1
            X //2
        }

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private bool playerOneTurn;
        private bool gameOver;

        private ButtonState[] results;
        public MainWindow()
        {
            InitializeComponent();
            NewGame();
        }

        private void NewGame()
        {
            results = new ButtonState[9];

            for (int i = 0; i < results.Length; i++)
            {
                results[i] = ButtonState.empty;
            }

            playerOneTurn = true;

            GameBoard.Children.Cast<Button>().ToList().ForEach(button =>
            {
                button.Content = string.Empty;
                button.Background = Brushes.White;
                button.Foreground = Brushes.Black;
            });

            gameOver = false;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (gameOver)
            {
                NewGame();
                return;
            }

            var button = (Button)sender;
            var colum = Grid.GetColumn(button);
            var row = Grid.GetRow(button);
            var index = colum + (row * 3);

            if (results[index] != ButtonState.empty)
                return;

            results[index] = playerOneTurn ? ButtonState.X : ButtonState.O;

            button.Content = playerOneTurn ? "X" : "O";

            playerOneTurn ^= true;

            WinnerCheck();

            
        }

        private void WinnerCheck()
        {
            //horizontal

            if(results[0] != ButtonState.empty && (results[0] & results[1] & results[2]) == results[0])
            {
                gameOver = true;
                Button0.Background = Button1.Background = Button2.Background = Brushes.Aquamarine;
            }
            else if (results[3] != ButtonState.empty && (results[3] & results[4] & results[5]) == results[3])
            {
                gameOver = true;
                Button3.Background = Button4.Background = Button5.Background = Brushes.Aquamarine;
            }
            else if (results[6] != ButtonState.empty && (results[6] & results[7] & results[8]) == results[6])
            {
                gameOver = true;
                Button6.Background = Button7.Background = Button8.Background = Brushes.Aquamarine;
            }

            //vertical

            if (results[0] != ButtonState.empty && (results[0] & results[3] & results[6]) == results[0])
            {
                gameOver = true;
                Button0.Background = Button3.Background = Button6.Background = Brushes.Aquamarine;
            }
            else if (results[1] != ButtonState.empty && (results[1] & results[4] & results[7]) == results[1])
            {
                gameOver = true;
                Button1.Background = Button4.Background = Button7.Background = Brushes.Aquamarine;
            }
            else if (results[2] != ButtonState.empty && (results[2] & results[5] & results[8]) == results[2])
            {
                gameOver = true;
                Button2.Background = Button5.Background = Button8.Background = Brushes.Aquamarine;
            }

            //vertical

            if (results[0] != ButtonState.empty && (results[0] & results[4] & results[8]) == results[0])
            {
                gameOver = true;
                Button0.Background = Button4.Background = Button8.Background = Brushes.Aquamarine;
            }
            else if (results[2] != ButtonState.empty && (results[2] & results[4] & results[6]) == results[2])
            {
                gameOver = true;
                Button2.Background = Button4.Background = Button6.Background = Brushes.Aquamarine;
            }

            else if (!results.Any(f => f == ButtonState.empty))
            {
                gameOver = true;

                GameBoard.Children.Cast<Button>().ToList().ForEach(button =>
                {
                    button.Background = Brushes.Orange;
                });
            }
        }
    }
}