private void btnSave_Click(object sender, EventArgs e) { Boolean res = ValidateOnlyNumbers(); ErrorObject result = ValidateBookng.IsValid(ListBookings, lblVID.Text, dateTimePicker2.Text, dateTimePicker3.Text, dateTimePicker5.Text, dateTimePicker6.Text); if (result.GetIsValid() && res == true) { save_booking(); MessageBox.Show(result.GetErrorMsg()); LoadGrid(); } else { MessageBox.Show(result.GetErrorMsg()); } }