HashSet<T>::UnionWith Method (IEnumerable<T>^)
Modifies the current HashSet<T> object to contain all elements that are present in itself, the specified collection, or both.
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.
Implements
ISet<T>::UnionWith(IEnumerable<T>^)| Exception | Condition |
|---|---|
| ArgumentNullException | other is null. |
This method is an O(n) operation, where n is the number of elements in the other parameter.
The following example demonstrates how to merge two disparate sets. This example creates two HashSet<T> objects, and populates them with even and odd numbers, respectively. A third HashSet<T> object is created from the set that contains the even numbers. The example then calls the UnionWith method, which adds the odd number set to the third set.
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1