private void btnDeleteTimeSlot_Click(object sender, EventArgs e)
{
if (timeSlotService.deleteTimeSlot(selectedTimeSlot.Id))
{
SuccessMessage sm = new SuccessMessage("Time-slot Deleted Successfully");
sm.Show();
dataGridTimeSlots.Rows.Clear();
populateData();
clear();
}
else
{
ErrorMessage em = new ErrorMessage("There is somthing wrong whent deleting times-slot");
em.Show();
}
}