C# (CSharp) DiscountAB примеры использования

Пример #1

 public MoreThan500Discount(DiscountAB next)
 {
     nextDiscount = next;
 }

Пример #2

 public NoDiscount(DiscountAB next)
 {
     nextDiscount = null;
 }

Пример #3

 public FiveOrMoreDiscount(DiscountAB next)
 {
     nextDiscount = next;
 }