解决方法
HashSet:
The
HashSet<T>
class provides high-performance set operations. A set is a collection that contains no duplicate elements,and whose elements are in no particular order…The capacity of a
HashSet<T>
object is the number of elements that the object can hold. AHashSet<T>
object’s capacity automatically increases as elements are added to the object.The
HashSet<T>
class is based on the model of mathematical sets and provides high-performance set operations similar to accessing the keys of the 07001 or 07002 collections. In simple terms,theHashSet<T>
class can be thought of as a 07001 collection without values.A
HashSet<T>
collection is not sorted and cannot contain duplicate elements…