อยากทราบการทำ confirm password ช่วยสอนหน่อยครับ C#

        private void button1_Click(object sender, EventArgs e)
        {
if (textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "" || textBox5.Text == "" || textBox6.Text == "" || textBox7.Text == "")
            {
                MessageBox.Show("กรุณากรอกข้อมูลให้ครบ");

            }

            if (textBox6.Text == textBox7.Text)
            {

                myConn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\\first\\โปรเจค\\Frist.accdb";
                myConn.Open();
                OleDbCommand mycommand = new OleDbCommand();
                OleDbTransaction myTransaction;

                OleDbParameter name = new OleDbParameter();
                name.ParameterName = "@N";
                name.OleDbType = OleDbType.Char;
                name.Direction = ParameterDirection.Input;
                name.Value = textBox1.Text;

                OleDbParameter Sur = new OleDbParameter();
                Sur.ParameterName = "@S";
                Sur.OleDbType = OleDbType.Char;
                Sur.Direction = ParameterDirection.Input;
                Sur.Value = textBox2.Text;

                OleDbParameter user = new OleDbParameter();
                user.ParameterName = "@U";
                user.OleDbType = OleDbType.Char;
                user.Direction = ParameterDirection.Input;
                user.Value = textBox5.Text;

                OleDbParameter Pass = new OleDbParameter();
                Pass.ParameterName = "@P";
                Pass.OleDbType = OleDbType.Char;
                Pass.Direction = ParameterDirection.Input;
                Pass.Value = textBox6.Text;

                OleDbParameter email = new OleDbParameter();
                email.ParameterName = "@E";
                email.OleDbType = OleDbType.Char;
                email.Direction = ParameterDirection.Input;
                email.Value = textBox3.Text;

                OleDbParameter tel = new OleDbParameter();
                tel.ParameterName = "@T";
                tel.OleDbType = OleDbType.Char;
                tel.Direction = ParameterDirection.Input;
                tel.Value = textBox4.Text;

                myTransaction = myConn.BeginTransaction();
                mycommand.CommandText = "INSERT INTO [member]([M_name],[M_surname],[M_user],[M_pass],[M_email],[M_tel])VALUES(@N,@S,@U,@P,@E,@T)";
                mycommand.CommandType = CommandType.Text;
                mycommand.Transaction = myTransaction;
                mycommand.Connection = myConn;
                mycommand.Parameters.Add(name);
                mycommand.Parameters.Add(Sur);
                mycommand.Parameters.Add(user);
                mycommand.Parameters.Add(Pass);
                mycommand.Parameters.Add(email);
                mycommand.Parameters.Add(tel);
                mycommand.ExecuteNonQuery();
                myTransaction.Commit();

            }
            
            else
            {
                MessageBox.Show("รหัสผ่านไม่ตรงกัน");
            }
        }