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C# - Example of LINQ Intersect() Method

Learn about the Linq Intersect() method and its C# implementation with an example. By Nidhi Last updated : April 01, 2023

Here we will find common integer numbers of two lists using the Linq Intersect() method. Then we will print common numbers on the console screen.

C# program to demonstrate the example of LINQ Intersect() method

The source code to demonstrate Linq Intersect() method, is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# Program to demonstrate Linq Intersect() method.

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

class Demo {
  static void Main(string[] args) {
    List < int > List1 = new List < int > () {
      10,
      20,
      30,
      40,
      50
    };
    List < int > List2 = new List < int > () {
      10,
      40,
      60,
      80,
      90
    };

    var result = List1.Intersect(List2);

    foreach(var value in result) {
      Console.WriteLine(value + " ");
    }
  }
}

Output

10
40
Press any key to continue . . .

Explanation

In the above program, we created two lists of integer numbers that are given below.

List<int> List1 = new List<int>() { 10, 20, 30, 40, 50 };
List<int> List2 = new List<int>() { 10, 40, 60, 80, 90 };

Here we used Linq Intersect() method to find common values of two lists using the below code.

var result = List1.Intersect(List2);

Then we print common values on the console screen using the below code.

foreach (var value in result)
{
    Console.WriteLine(value + " ");
} 

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