Tic Tac Toe

namespace WindowsFormsApp2
{
    public partial class Form : System.Windows.Forms.Form
    {
        bool Player1 = true;
        int ScoreX = 0;
        int ScoreO = 0;

        public Form()
        {
            InitializeComponent();
            b1.Click += ClickCheck;
            b2.Click += ClickCheck;
            b3.Click += ClickCheck;
            b4.Click += ClickCheck;
            b5.Click += ClickCheck;
            b6.Click += ClickCheck;
            b7.Click += ClickCheck;
            b8.Click += ClickCheck;
            b9.Click += ClickCheck;
        }

        private void bexit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void babout_Click(object sender, EventArgs e)
        {
            MessageBox.Show("By Seydie");
        }

        private void ClickCheck(object sender, EventArgs e)
        {
            if (sender is Button)
            {
                Button b = sender as Button;

                if (Player1 == true && b.Text == "")
                {
                    b.Text = "X";
                    Player1 = false;
                }

                else if (b.Text == "X" || b.Text == "O")
                {
                }

                else
                {
                    b.Text = "O";
                    Player1 = true;
                }

                if ((b1.Text == "X" && b2.Text == "X" && b3.Text == "X") || (b1.Text == "X" && b4.Text == "X" && b7.Text == "X") || (b1.Text == "X" && b5.Text == "X" && b9.Text == "X") || (b2.Text == "X" && b5.Text == "X" && b8.Text == "X") || (b3.Text == "X" && b5.Text == "X" && b7.Text == "X") || (b3.Text == "X" && b6.Text == "X" && b9.Text == "X") || (b7.Text == "X" && b8.Text == "X" && b9.Text == "X") || (b4.Text == "X" && b5.Text == "X" && b6.Text == "X"))
                {
                    MessageBox.Show("Player 1 won!");
                    ScoreX++;
                    EmptyBoard();
                    Player1 = false;
                }

                if ((b1.Text == "O" && b2.Text == "O" && b3.Text == "O") || (b1.Text == "O" && b4.Text == "O" && b7.Text == "O") || (b1.Text == "O" && b5.Text == "O" && b9.Text == "O") || (b2.Text == "O" && b5.Text == "O" && b8.Text == "O") || (b3.Text == "O" && b5.Text == "O" && b7.Text == "O") || (b3.Text == "O" && b6.Text == "O" && b9.Text == "O") || (b7.Text == "O" && b8.Text == "O" && b9.Text == "O") || (b4.Text == "O" && b5.Text == "O" && b6.Text == "O"))
                {
                    MessageBox.Show("Player 2 won!");
                    ScoreO++;
                    EmptyBoard();
                    Player1 = true;
                }
                if (b1.Text != "" && b2.Text != "" && b3.Text != "" && b4.Text != "" && b5.Text != "" && b6.Text != "" && b7.Text != "" && b8.Text != "" && b9.Text != "")
                {
                    DialogResult dialogResult = MessageBox.Show("Do you want to play another game?", "No winner", MessageBoxButtons.YesNo);
                    if (dialogResult == DialogResult.Yes)
                    {
                        EmptyBoard();
                        Player1 = true;
                    }

                    else if (dialogResult == DialogResult.No)
                    {
                        Application.Exit();
                    }
                }
            }

            else
            {
                MessageBox.Show("Oops! Something went wrong!");
                Application.Exit();
            }
            score.Text = "Score: X = " + ScoreX + " | O = " + ScoreO;
        }

        private void bretry_Click(object sender, EventArgs e)
        {
            EmptyBoard();
            Player1 = true;
        }

        public void EmptyBoard()
        {
            b1.Text = "";
            b2.Text = "";
            b3.Text = "";
            b4.Text = "";
            b5.Text = "";
            b6.Text = "";
            b7.Text = "";
            b8.Text = "";
            b9.Text = "";
        }
    }
}