public DiscountSpecific(MotivDiscount motiv, DateTime dataInceput, TimeSpan durata,
                         float sumaAditionala, float procentDiscount) : base(procentDiscount)
 {
     this.motivDiscount  = motiv;
     this.dataInceput    = dataInceput;
     this.durata         = durata;
     this.SumaAditionala = sumaAditionala;
 }
 public override void CopyDiscount(IDiscount Idiscount)
 {
     if (Idiscount is DiscountSpecific)
     {
         base.CopyDiscount(Idiscount);
         var discount = Idiscount as DiscountSpecific;
         this.sumaAditionala = discount.sumaAditionala;
         this.motivDiscount  = discount.motivDiscount;
         this.dataInceput    = discount.dataInceput;
         this.durata         = discount.durata;
     }
 }