Calculado en c #

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();

        }

        DialogResult Res;        bool b1, b2, b3, b4, b5, b6, b7, b8, b9, o1, o2, o3, o4, o5, o6, o7, o8, o9;

        private void button1_Click(object sender, EventArgs e)
        {

            if (label2.Text == "Turno deX")
            {
                button1.Text = "X";
                label2.Text = "Turno de O";
                b1 = true;
                button1.Enabled = false;
                Ganador();            }

            else if (label2.Text == "Turno de O")
            {
                button1.Text = "O";
                label2.Text = "Turno de X";
                o1 = true;                button1.Enabled = false;
                Ganador();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (label2.Text == "Turnode X")
            {
                button2.Text = "X";
                label2.Text = "Turno de O";
                b2 = true;
                button2.Enabled = false;
               Ganador();
            }

            else if (label2.Text == "Turno de O")
            {
                button2.Text = "O";
                label2.Text = "Turno de X";
                o2 = true;                button2.Enabled = false;
                Ganador();
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (label2.Text== "Turno de X")
            {
                button3.Text = "X";
                label2.Text = "Turno de O";
                b3 = true;
                button3.Enabled = false;...