Convert List of Int to Array of Int in C#

This post will discuss how to convert List of Int to Array of Int in C#.

1. Using `List<T>.ToArray()` Method

The standard solution to convert a List<T> into a T[] is to invoke the List<T>.ToArray() method on the List. It copies all elements of a List<T> to a new array of the same type. The following example demonstrates the usage of the ToArray() method to create an array containing copies of the elements of the List.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<int> list = new List<int>() { 5, 3, -8, 7, -1 };

int[] array = list.ToArray();

Console.WriteLine(String.Join(", ", array)); // 5, 3, -8, 7, -1

}

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2. Using `List<T>.CopyTo()` Method

The List<T>.CopyTo() method copies the List<T> (or a portion of it) to an array. You can use it as follows to convert a List of integers to an array of integers.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<int> list = new List<int>() { 5, 3, -8, 7, -1 };

int[] array = new int[list.Count];

list.CopyTo(array);

Console.WriteLine(String.Join(", ", array)); // 5, 3, -8, 7, -1

}

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That’s all about converting List of Int to Array of Int in C#.

Convert List of Int to Array of Int in C#

1. Using List<T>.ToArray() Method

2. Using List<T>.CopyTo() Method

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1. Using `List<T>.ToArray()` Method

2. Using `List<T>.CopyTo()` Method