private void btnAdd_Click(object sender, EventArgs e)
        {
            bool entrada;

            if (radioButton1.Checked)
            {
                entrada = true;
            }
            else
            {
                entrada = false;
            }
            try
            {
                RegistroDAO.AgregarRegistro(new Registro(entrada, dateTimePicker1.Value,
                                                         (int)numericUpDown1.Value, cmbId.Text));
                MessageBox.Show("Registration succeed!");
                Actualizaciones.Invoke();
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message);
            }
        }