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: 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: Example 2: Reference: Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.
mySet1.IsSupersetOf(mySet2);
// 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
// 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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