C# | Check if a SortedSet is a subset of the specified collection

Last Updated : 01 Feb, 2019

SortedSet class represents the collection of objects in sorted order. This class comes under the System.Collections.Generic namespace. SortedSet<T>.IsSubsetOf(IEnumerable<T>) Method is used to check whether a SortedSet<T> object is a subset of the specified collection or not.

Properties:

In C#, SortedSet class can be used to store, remove or view elements.
It maintains ascending order and does not store duplicate elements.
It is suggested to use SortedSet class if you have to store unique elements and maintain ascending order.

Syntax :

mySet1.IsSubsetOf(mySet2);

Here, mySet1 and mySet2 are SortedSets.

Return Value: This method returns True if the SortedSet<T> object is subset of other, otherwise false.

Exception: This method returns the ArgumentNullException if the SortedSet is null.

Example 1:

// C# code to Check if a SortedSet is a 
// subset of the specified collection 
using System; 
using System.Collections.Generic; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Creating a SortedSet of integers 
        SortedSet<int> mySet1 = new SortedSet<int>(); 
  
        // Inserting elements in SortedSet 
        mySet1.Add(2); 
        mySet1.Add(3); 
        mySet1.Add(4); 
        mySet1.Add(5); 
  
        // Creating a SortedSet of integers 
        SortedSet<int> mySet2 = new SortedSet<int>(); 
  
        // Inserting elements in SortedSet 
        mySet2.Add(3); 
        mySet2.Add(4); 
        mySet2.Add(5); 
        mySet2.Add(6); 
  
        // Check if a SortedSet is a subset 
        // of the specified collection 
        // It should return false as SortedSet mySet2 
        // is not a subset of SortedSet mySet1 
        Console.WriteLine(mySet2.IsSubsetOf(mySet1)); 
    } 
} 

Output:

False

Example 2:

// C# code to Check if a SortedSet is a 
// subset of the specified collection 
using System; 
using System.Collections.Generic; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Creating a SortedSet of strings 
        SortedSet<string> mySet1 = new SortedSet<string>(); 
  
        // Inserting elements in SortedSet 
        mySet1.Add("A"); 
        mySet1.Add("B"); 
        mySet1.Add("C"); 
        mySet1.Add("D"); 
        mySet1.Add("A"); 
  
        // Creating a SortedSet of strings 
        SortedSet<string> mySet2 = new SortedSet<string>(); 
  
        // Inserting elements in SortedSet 
        mySet2.Add("B"); 
        mySet2.Add("C"); 
        mySet2.Add("D"); 
        mySet2.Add("D"); 
  
        // Check if a SortedSet is a subset 
        // of the specified collection 
        // It should return true as SortedSet mySet2 
        // is subset of SortedSet mySet1 
        Console.WriteLine(mySet2.IsSubsetOf(mySet1)); 
    } 
} 