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

Last Updated : 03 Jul, 2019

SortedSet class represents the collection of objects in sorted order. This class comes under the System.Collections.Generic namespace. SortedSet<T>.IsProperSubsetOf(IEnumerable<T>) method is used to check if a SortedSet<T> object is a proper 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.IsProperSubsetOf(mySet2);

Here, mySet1 and mySet2 are the objects of two SortedSets.

Return Value: This method return True if the SortedSet<T> object is a proper subset of other, otherwise False.

Below programs illustrate the use of SortedSet<T>.IsProperSubsetOf(IEnumerable<T>) method:

Example 1:

// C# code to Check if a SortedSet is a
// proper 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
        for (int i = 0; i < 10; i++) {
            mySet1.Add(i);
        }
  
        // 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 proper subset
        // of the specified collection
        // It should return true as SortedSet mySet2
        // is a proper subset of SortedSet mySet1
        Console.WriteLine(mySet2.IsProperSubsetOf(mySet1));
    }
}

Output:

True

Example 2:

// C# code to Check if a SortedSet is a
// proper 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("E");
  
        // 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("E");
  
        // Check if a SortedSet is a proper subset
        // of the specified collection
        // It should return true as SortedSet mySet1
        // is proper subset of SortedSet mySet2
        Console.WriteLine(mySet2.IsProperSubsetOf(mySet1));
    }
}

Output:

True

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.sortedset-1.ispropersubsetof?view=netcore-2.1

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