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. HashSet<T>.IsSupersetOf(IEnumerable
Syntax:
mySet1.IsSupersetOf(mySet2);
Here, mySet1 and mySet2 are the two HashSets.
Return Value: This method returns True if the HashSet object is a superset of another subset otherwise it retunrs False.
Exception: This method will give ArgumentNullException if the HashSet is null.
Below given are some examples to understand the implementation in a better way:
Example 1:
// C# code to Check if a HashSet is a // superset of the specified collection using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a HashSet of strings HashSet< string > mySet1 = new HashSet< string >(); // Inserting elements in HashSet mySet1.Add( "Geeks" ); mySet1.Add( "GeeksQuiz" ); // Creating a HashSet of strings HashSet< string > mySet2 = new HashSet< string >(); // Inserting elements in HashSet mySet2.Add( "DS" ); mySet2.Add( "C++" ); mySet2.Add( "Java" ); mySet2.Add( "JavaScript" ); mySet2.Add( "GeeksQuiz" ); mySet2.Add( "Geeks" ); // Check if a HashSet is a superset // of the specified collection // It should return true as HashSet mySet2 // is superset of HashSet mySet1 Console.WriteLine(mySet2.IsSupersetOf(mySet1)); } } |
True
Example 2:
// C# code to Check if a HashSet is a // superset of the specified collection using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a HashSet of integers HashSet< int > mySet1 = new HashSet< int >(); // Inserting elements in HashSet mySet1.Add(2); mySet1.Add(3); mySet1.Add(4); mySet1.Add(5); // Creating a HashSet of integers HashSet< int > mySet2 = new HashSet< int >(); // Inserting elements in HashSet mySet2.Add(3); mySet2.Add(4); mySet2.Add(5); mySet2.Add(6); // Check if a HashSet is a superset // of the specified collection // It should return false as HashSet mySet2 // is not a superset of HashSet mySet1 Console.WriteLine(mySet2.IsSupersetOf(mySet1)); } } |
False
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