HashSet<T>.IsSupersetOf Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Determines whether a HashSet<T> object is a superset of the specified collection.
Assembly: System.Core (in System.Core.dll)
Parameters
- other
- Type: System.Collections.Generic.IEnumerable<T>
The collection to compare to the current HashSet<T> object.
Return Value
Type: System.Booleantrue if the HashSet<T> object is a superset of other; otherwise, false.
Implements
ISet<T>.IsSupersetOf(IEnumerable<T>)| Exception | Condition |
|---|---|
| ArgumentNullException | other is null. |
All collections, including the empty set, are supersets of the empty set. Therefore, this method returns true if the collection represented by the other parameter is empty, even if the current HashSet<T> object is empty.
This method always returns false if Count is less than the number of elements in other.
If the collection represented by other is a HashSet<T> collection with the same equality comparer as the current HashSet<T> object, this method is an O(n) operation. Otherwise, this method is an O(n + m) operation, where n is the number of elements in other and m is Count.