C# / .NET - uppercase all List elements

In this article, we would like to show you how to uppercase all List elements in C#.

Quick solution:

List<string> myList = new List<string> { "a", "b", "c" };

myList = myList.Select(x => x.ToUpper()).ToList();

Practical example

In this example, we select all items from myList and uppercase them using ToUpper() method.

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

public class Program
{
    public static void Main()
    {
        List<string> myList = new List<string> { "a", "b", "c" };

        // uppercase all elements
        myList = myList.Select(x => x.ToUpper()).ToList();

        // display result
        myList.ForEach(x => Console.WriteLine(x));
    }
}

Output:

A
B
C

References

1. Enumerable.Select Method (System.Linq) | Microsoft Docs
2. String.ToUpper Method (System) | Microsoft Docs