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

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

Answer

To check if two lists are equal in C#, you can use the SequenceEqual method from the LINQ namespace or compare each element individually.

✐ Examples

1 Check Equality Using SequenceEqual Method

In this example,

We create two lists: list1 and list2 with initial values.
We use the SequenceEqual method to check if list1 equals list2.
Finally, we print the result to standard output.

C# Program

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

class Program {
    static void Main() {
        List<int> list1 = new List<int> {1, 2, 3};
        List<int> list2 = new List<int> {1, 2, 3};
        bool result = list1.SequenceEqual(list2);
        Console.WriteLine($"Are the lists equal? {result}");
    }
}

Output

Are the lists equal? True

2 Check Equality Using Elementwise Comparison

In this example,

We create two lists: list1 and list2 with initial values.
We iterate over both lists using a loop and compare each element individually.
If any element differs between list1 and list2, then the lists are not equal.
Finally, we print the result to standard output.

C# Program

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        List<int> list1 = new List<int> {1, 2, 3};
        List<int> list2 = new List<int> {1, 2, 4};
        bool equal = true;
        if (list1.Count != list2.Count) {
            equal = false;
        }
        else {
            for (int i = 0; i < list1.Count; i++) {
                if (list1[i] != list2[i]) {
                    equal = false;
                    break;
                }
            }
        }
        Console.WriteLine($"Are the lists equal? {equal}");
    }
}

Output

Are the lists equal? False

Summary

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

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

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

Answer

✐ Examples

1 Check Equality Using SequenceEqual Method

C# Program

Output

2 Check Equality Using Elementwise Comparison

C# Program

Output

Summary

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