public void add(passangerInformation passanger)
 {
     using (FlySusDataContext context = new FlySusDataContext())
     {
         context.passangerInformations.Add(passanger);
         context.SaveChanges();
     }
 }
 public void delete(passangerInformation passanger)
 {
     using (FlySusDataContext context = new FlySusDataContext())
     {
         var entity = context.Entry(passanger);
         entity.State = EntityState.Deleted;
         context.SaveChanges();
     }
 }