LINQ Union Method

In LINQ, the Union method or operator is used to combine the multiple collections into a single collection and return the resultant collection with a unique element.

Here is the pictorial representation of the LINQ Union Method.

Union method will combine both the collections into a single collection and return the unique elements from the collections by removing the duplicate elements.

Syntax of LINQ union Method

Here is the syntax of using the union method to get the unique elements from the multiple collections.

In the above syntax, we are combining two collections to get the result as a single collection using the union method.

Example of LINQ Union Method

Here is the example of using the LINQ Union Method.

using System;
using System. Collections;
using System.Collections.Generic;
using System. Linq;
using System. Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Programme2
    {
        static void Main(string[] args)
        {
//create array count1 and count2 of type string
            string[] count1 = { "India", "USA", "UK", "Australia" };
            string[] count2 = { "India", "Canada", "UK", "China" };
//count1.Union(count2) is used to find out the unique element from both the collection
            var result = count1.Union(count2);
//foreach loop is used to print the output conaining in the result
            foreach (var item in result)
            {
                Console.WriteLine(item);
            }
                Console.ReadLine();
        }
    }
}

In the above example, we are combining the two collections "count1","count2" using the union method to get the unique elements from both the collections.

OUTPUT:

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