public bool UpdateDonor(Donor donor)
        {
            Donor dataDonor = entities.Donors.SingleOrDefault(d => d.DonorID == donor.DonorID);
            if (dataDonor != null)
            {
                dataDonor.Email = donor.Email;
                dataDonor.FirstName = donor.FirstName;
                dataDonor.LastName = donor.LastName;

                int updated = entities.SaveChanges();
                return (updated > 0);
            }
            return false;
        }
 public Donor CreateDonor(Donor donor)
 {
     entities.Donors.Add(donor);
     int newID = entities.SaveChanges();
     return donor;
 }