kodlarımda yanlıs olan nedir lütfen yardım

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.OleDb;

namespace accescontrycomd
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        OleDbConnection baglanti = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=bgdos.accdb");

        OleDbCommand komut = new OleDbCommand();

        DataTable tablo = new DataTable("bgtab");
        
        private **** button3_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private **** Form1_Load(object sender, EventArgs e)
        {
            dataGridView1.Hide();

            button4.Hide();
            OleDbDataAdapter alıcı = new OleDbDataAdapter("Select * From bgtab", baglanti);

            alıcı.Fill(tablo);

            dataGridView1.DataSource = tablo;
            baglanti.Open();

            komut.Connection = baglanti;

            komut.CommandText = "INSERT INTO bgtab (AdSoyad,Sınıf,Numara,PuanTürü,BölümAdı,Okul,Dipnot) VALUES ('" + textBox1.Text + "','" + textBox2.Text + "','" + textBox3.Text + "','" + textBox4.Text + "','" + textBox5.Text + "','" + textBox6.Text + "','" + textBox7.Text + "')";

            komut.ExecuteNonQuery();

            baglanti.Close();



            this.AcceptButton = button1;
            this.CancelButton = button3;

        }

        private **** button2_Click(object sender, EventArgs e)
        {
            dataGridView1.Show();
            button4.Show();
            
        }

        private **** button2_TextChanged(object sender, EventArgs e)
        {
            
        }

        private **** button4_Click(object sender, EventArgs e)
        {
            dataGridView1.Hide();
        }

        private **** textBox6_TextChanged(object sender, EventArgs e)
        {

        }
    }
}