对于这样的场景:publicinterfaceIAnimal{}publicinterfaceIGiraffe:IAnimal{}publicinterfaceIQuestionableCollection:IEnumerable{voidSomeAction();}publicinterfaceIQuestionableCollection:IQuestionableCollection,IEnumerablewhereT:IAnimal{}publicclassQuestionableCollection:IQuestionableCollectionwhereT:IAnimal{