A HashSet is an unordered collection of the unique elements. It comes under System.Collections.Generic namespace. It is used in a situation where we want to prevent duplicates from being inserted in the collection. As far as performance is concerned, it is better in comparison to the list. Elements can be added to HashSet using HashSet
Here mySet is the name of the HashSet.
item: The element to add to the set.
Return Type: This method returns true if the element is added to the HashSet
Below given are some examples to understand the implementation in a better way:
1 3 5 7 9
Geeks GeeksforGeeks GeeksClasses GeeksQuiz
- C# | Remove the specified element from a HashSet
- C# | Check if a HashSet contains the specified element
- HashSet in C# with Examples
- C# | Union of two HashSet
- C# | HashSet Class
- C# | Getting an enumerator that iterates through HashSet<T>
- C# | Remove all elements from a HashSet
- C# | Create HashSet from another collection
- C# | Number of elements in HashSet
- C# | Check if two HashSet<T> objects are equal
- C# | Remove all elements in a collection from a HashSet
- C# | Check if a HashSet is a superset of the specified collection
- C# | Check if a HashSet is a subset of the specified collection
- C# | Check if HashSet and the specified collection contain the same elements
- C# | Check if a HashSet is a proper superset of the specified collection
- C# | Check if a HashSet is a proper subset of the specified collection
- C# | Remove elements from a HashSet with conditions defined by the predicate
- C# | Check if a HashSet and a specified collection share common elements
- C# | How to get Fifth Element of the Tuple?
- C# | How to get Third Element of the Tuple?
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.