//variables
        bool xTurn = true;
        int[,] board = new int[3,3];
        int X = 1;
        int O = 2;
        int win;



        public Form1()
        {
            InitializeComponent();
            didWin(board, X, O, win);
        }

        public void button1_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button1.Text = "X";
                xTurn = false;
                board[0,0] = X;
            }
            else
            {
                button1.Text = "O";
                xTurn = true;
                board[0,0] = O;
            }

        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button2.Text = "X";
                xTurn = false;
                board[0,1] = X;
            }
            else
            {
                button2.Text = "O";
                xTurn = true;
            }

        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button3.Text = "X";
                xTurn = false;
                board[0,2] = X;
            }
            else
            {
                button3.Text = "O";
                xTurn = true;
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button4.Text = "X";
                xTurn = false;
                board[1,0] = X;
            }
            else
            {
                button4.Text = "O";
                xTurn = true;
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button5.Text = "X";
                xTurn = false;
                board[1,1] = X;
            }
            else
            {
                button5.Text = "O";
                xTurn = true;
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button6.Text = "X";
                xTurn = false;
                board[1,2] = X;
            }
            else
            {
                button6.Text = "O";
                xTurn = true;
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button7.Text = "X";
                xTurn = false;
                board[2,0] = X;
            }
            else
            {
                button7.Text = "O";
                xTurn = true;
            }
        }

        private void button8_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button8.Text = "X";
                xTurn = false;
                board[2,1] = X;
            }
            else
            {
                button8.Text = "O";
                xTurn = true;
            }
        }

        private void button9_Click(object sender, EventArgs e)
        {
            if (xTurn == true)
            {
                button9.Text = "X";
                xTurn = false;
                board[2,2] = X;
            }
            else
            {
                button9.Text = "O";
                xTurn = true;
            }
        }

        private void button10_Click(object sender, EventArgs e)
        {
            button1.Text = "";
            button2.Text = "";
            button3.Text = "";
            button4.Text = "";
            button5.Text = "";
            button6.Text = "";
            button7.Text = "";
            button8.Text = "";
            button9.Text = "";

        }

        public static int[,] didWin(int[,] board, int X, int O, int win)
        {
            if (board[0, 0] == X && board[0, 1] == X && board[0, 2] == X || board[0, 0] == O && board[0, 1] == O && board[0, 2] == O)
            {
                win = 1;
            }
            return win;
        }