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C# / .NET - compare arrays

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Created by:

Zeeshan-Peel

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In this article, we would like to show you how to compare two arrays in C#.

Note:

As arrays comparison, we understand size and array items comparison. That comparision may be realised using embedded SequenceEqual() method.

Quick solution:

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// using System.Linq;
​
int[] array1 = new int[] { 1, 2, 3 };
int[] array2 = new int[] { 1, 2, 3 };
​
Console.WriteLine(array1.SequenceEqual(array2)); // True

Items comparion example

Edit

In this section, we can see items comparions example.

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// using System.Linq;
​
int[] array1 = new int[] { 1, 2, 3 };
int[] array2 = new int[] { 1, 2, 3 };
int[] array3 = new int[] { 3, 2, 1 };
​
Console.WriteLine(array1.SequenceEqual(array2));
Console.WriteLine(array1.SequenceEqual(array3));

Output:

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True
False

References comparion example

Edit

The example presented in this section is useful when we want to check if 2 variables indicate same array object in the memory.

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int[] array1 = new int[] { 1, 2, 3 };
int[] array2 = new int[] { 1, 2, 3 };
​
Console.WriteLine(array1 == array1);
Console.WriteLine(array1 == array2);
Console.WriteLine(array2 == array2);