public static int BusinessTalepEkle(EntityBasvuru p)
 {
     if (p.Ogrenciid != null && p.Dersid != null)
     {
         return(DataDers.talepekle(p));
     }
     return(-1);
 }
 public static List <EntityDersler> BusinessDersListele()
 {
     return(DataDers.DersListesi());
 }