How to get Subset from a Set in C# - Step by Step Examples

How to get Subset from a Set in C# ?

Answer

To get a subset from a Set in C#, you can use LINQ methods such as Where to filter elements based on a condition.


✐ Examples

1 Get Subset of Even Numbers from a Set

In this example,

  1. We create a HashSet named numbers and initialize it with some integer elements.
  2. We use the Where method from the LINQ library to filter the elements that satisfy a specific condition (in this case, being even).
  3. We convert the filtered result back to a HashSet using the ToHashSet method.
  4. We print the subset to the console to verify the result.

C# Program

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        HashSet<int> numbers = new HashSet<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        HashSet<int> evenNumbers = numbers.Where(n => n % 2 == 0).ToHashSet();
        Console.WriteLine("Subset of even numbers:");
        foreach (int number in evenNumbers)
        {
            Console.WriteLine(number);
        }
    }
}

Output

Subset of even numbers:
2
4
6
8
10

2 Get Subset of Numbers Greater Than 5 from a Set

In this example,

  1. We create a HashSet named numbers and initialize it with some integer elements.
  2. We use the Where method from the LINQ library to filter the elements that are greater than 5.
  3. We convert the filtered result back to a HashSet using the ToHashSet method.
  4. We print the subset to the console to verify the result.

C# Program

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        HashSet<int> numbers = new HashSet<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        HashSet<int> numbersGreaterThanFive = numbers.Where(n => n > 5).ToHashSet();
        Console.WriteLine("Subset of numbers greater than 5:");
        foreach (int number in numbersGreaterThanFive)
        {
            Console.WriteLine(number);
        }
    }
}

Output

Subset of numbers greater than 5:
6
7
8
9
10

Summary

In this tutorial, we learned How to get Subset from a Set in C# language with well detailed examples.


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  27. How to Remove Specific Item from a Set in C# ?
  28. How to Remove Items from Set based on a Condition in C# ?
  29. How to create a Set of Sets in C# ?