A. B. C. D.
You need to select a class that is optimized for key-based item retrieval from both small and large collections. Which class should you choose?()
A.OrderedDictionary class B.HybridDictionary class C.ListDictionary class D.Hashtable class
You are developing a custom-collection class.You need to create a method in your class. You need to ensure that the method you create in your class returns a type that is compatible with the Foreach statement. Which criterion should the method meet?()
A.The method must return a type of either IEnumerator or IEnumerable. B.The method must return a type of IComparable. C.The method must explicitly contain a collection. D.The method must be the only iterator in the class.