Convert List of string to List of Int in C#

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

We can use LINQ’s Select() method to convert List<string> to List<int> in C#. The Select() method projects each element of a sequence into a new form. The following code demonstrates its usage:

using System;

using System.Linq;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<string> list = new List<string> { "1", "2", "3", "4" };

List<int> array = list.Select(int.Parse).ToList();

Console.WriteLine(String.Join(", ", array)); // 1, 2, 3, 4

}

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Alternatively, you can use the List<T>.ConvertAll() method to convert a list of one type to another type. We can use it to convert a List of String to a List of Int as follows.