HashSet<T>::UnionWith Method (IEnumerable<T>^)
.NET Framework (current version)
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.
Universal Windows Platform
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
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
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