LINQ SequenceEqual Method

In LINQ, the SequenceEqual method is used to compare the sequence of two collections that are equal or not. It determines two sequences whether they are equal or not by comparing the elements in a pair-wise manner, and two sequences contain the equality number of the element or not.

The LINQ SequenceEqual method will return the Boolean value true in case two sequence elements are equal, and all the elements match in both the sequences; otherwise, it will throw false.

Syntax of LINQ SequenceEqual Method

The syntax of using LINQ SequenceEqual method to check the given two collections are equal or not.

In the above syntax, we are using the LINQ SequenceEqual method to check whether "arr1" and "arr2" are equal or not.

Example of LINQ SequenceEqual Method

Here is the example of the LINQ SequenceEqual Method to check the equality of two sequences.

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 array1,array2,array3 and array4 string array
            string[] array1 = { "welcome", "to", "tutlane", "com" };
            string[] array2 = { "welcome", "TO", "Noida", "com" };
            string[] array3 = { "welcome", "to", "noida" };
            string[] array4 = { "WELCOME", "TO", "NOIDA" };
//Sequence.Equal() method is used to check if both te sequences are equal or not
            var res1 = array1.SequenceEqual(array2);
            var res2 = array1.SequenceEqual(array2, StringComparer.OrdinalIgnoreCase);
            var res3 = array1.SequenceEqual(array3);
            var res4 = array3.SequenceEqual(array4, StringComparer.OrdinalIgnoreCase);
            Console.WriteLine("Result1: {0}", res1);
            Console.WriteLine("Result2: {0}", res2);
            Console.WriteLine("Result3: {0}", res3);
            Console.WriteLine("Result4: {0}", res4);
            Console.ReadLine();
        }
    }
}

In the above example, we are comparing two collections using the SequenceEqual method to check if both the sequences are equal or not. Here we used another property "OrdinalIgnoreCase" along with the SequenceEqual method to overcome the problem of case sensitivity. The SequenceEqual treats the "NOIDA" and "noida" as two different elements because of case sensitiveness.

OUTPUT: