HashSet<T>.IsSubsetOf Method
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Determines whether a HashSet<T> object is a subset of the specified collection.
Namespace: System.Collections.Generic
Assembly: System.Core (in System.Core.dll)
Syntax
'Declaration
Public Function IsSubsetOf ( _
other As IEnumerable(Of T) _
) As Boolean
public bool IsSubsetOf(
IEnumerable<T> other
)
Parameters
- other
Type: System.Collections.Generic.IEnumerable<T>
The collection to compare to the current HashSet<T> object.
Return Value
Type: System.Boolean
true if the HashSet<T> object is a subset of other; otherwise, false.
Implements
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | other is nulla null reference (Nothing in Visual Basic). |
Remarks
An empty set is a subset of any other collection, including an empty set; therefore, this method returns true if the collection represented by the current HashSet<T> object is empty, even if the other parameter is an empty set.
This method always returns false if Count is greater 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 Count and m is the number of elements in other.
Version Information
Silverlight
Supported in: 5, 4
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.