How to find Union of Two Sets in C# - Step by Step Examples

How to find Union of Two Sets in C# ?

Answer

To find the union of two sets in C#, you can use the UnionWith method provided by the HashSet class.


✐ Examples

1 Find Union of Two Sets

In this example,

  1. We create two HashSet objects, set1 and set2, containing some elements.
  2. We use the UnionWith method of set1 to perform the union operation with set2.
  3. After the union operation, set1 contains all the unique elements from both set1 and set2.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        HashSet<int> set1 = new HashSet<int> { 1, 2, 3 };
        HashSet<int> set2 = new HashSet<int> { 3, 4, 5 };

        set1.UnionWith(set2);

        Console.WriteLine("Union of set1 and set2:");
        foreach (int item in set1)
        {
            Console.WriteLine(item);
        }
    }
}

Output

Union of set1 and set2:
1
2
3
4
5

2 Find Union of Two Sets (String Sets)

In this example,

  1. We create two HashSet objects, set1 and set2, containing some string elements.
  2. We use the UnionWith method of set1 to perform the union operation with set2.
  3. After the union operation, set1 contains all the unique elements from both set1 and set2.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        HashSet<string> set1 = new HashSet<string> { "apple", "banana", "orange" };
        HashSet<string> set2 = new HashSet<string> { "orange", "pear", "grape" };

        set1.UnionWith(set2);

        Console.WriteLine("Union of set1 and set2:");
        foreach (string item in set1)
        {
            Console.WriteLine(item);
        }
    }
}

Output

Union of set1 and set2:
apple
banana
orange
pear
grape

Summary

In this tutorial, we learned How to find Union of Two Sets in C# language with well detailed examples.


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  22. How to Convert a Set of Integers to a Set of Strings in C# ?
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  27. How to Remove Specific Item from a Set in C# ?
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