protected void btn_Guardar_Click(object sender, EventArgs e)
{
Reservation r = new Reservation(Int32.Parse(txb_starTime.Text), Int32.Parse(txb_endTime.Text), txb_course.Text, txb_Observation.Text,Cld_Date.SelectedDate.ToShortDateString(),12);
lbl_muestra.Text = r.Date.ToString();
ReservationBusiness rb = new ReservationBusiness();
rb.Insert(r);
}