How to check if Two Sets are Equal in C# - Step by Step Examples

How to check if Two Sets are Equal in C# ?

Answer

To check if two sets are equal in C#, you can use LINQ to compare the elements of the sets.


✐ Examples

1 Check Equality of Two Sets

In this example,

  1. We define two HashSet objects, set1 and set2, containing elements of the sets.
  2. We use LINQ's SequenceEqual method to compare the elements of the two sets.
  3. If the two sets are equal, the SequenceEqual method returns true; otherwise, it returns false.

C# Program

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

public class Program
{
    public static void Main()
    {
        HashSet<int> set1 = new HashSet<int> { 1, 2, 3, 4 };
        HashSet<int> set2 = new HashSet<int> { 1, 2, 3, 4 };
        
        bool areEqual = set1.OrderBy(x => x).SequenceEqual(set2.OrderBy(x => x));
        
        Console.WriteLine("Sets are equal: " + areEqual);
    }
}

Output

Sets are equal: True

2 Check Equality of Unequal Sets

In this example,

  1. We define two HashSet objects, set1 and set2, containing elements of the sets.
  2. We use LINQ's SequenceEqual method to compare the elements of the two sets.
  3. Even if the sets contain the same elements, if their order is different, the SequenceEqual method will return false.

C# Program

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

public class Program
{
    public static void Main()
    {
        HashSet<int> set1 = new HashSet<int> { 1, 2, 3, 4 };
        HashSet<int> set2 = new HashSet<int> { 4, 3, 2, 1 };
        
        bool areEqual = set1.OrderBy(x => x).SequenceEqual(set2.OrderBy(x => x));
        
        Console.WriteLine("Sets are equal: " + areEqual);
    }
}

Output

Sets are equal: False

Summary

In this tutorial, we learned How to check if Two Sets are Equal in C# language with well detailed examples.


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