private void btRegisterUser_Click(object sender, EventArgs e)
        {
            try
            {
                ManipulationDB manipulationDB = new ManipulationDB();
                int            adm            = 0;
                if (chbAdmin.Checked == true)
                {
                    adm = 1;
                }
                else
                {
                    adm = 0;
                }

                string query = "UPDATE Пользователь SET " +
                               "Логин = '" + tbUser.Text + "', Пароль = '" + shifr_PBKDF2.Encrypt(Convert.ToString(tbPassword.Text), "204503") + "', Администрирование = '" + adm + "'" +
                               " WHERE ИД =";
                manipulationDB.Update(query);
                this.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка");
            }
        }