In this source code example, we will demonstrate the usage of List ConvertAll in C#.

The ConvertAll method converts the elements in the current List to another type and returns a list containing the converted elements.

C# List ConvertAll example

In the example, we have a list of fruits. We convert the list to two other lists.

using System;
using System.Collections.Generic;

public class ListDemo
{
    public static void Main(string[] args)
    {
        var fruits = new List<string> { "banana", "mango", "apple", "watermelon" };

        List<string> uppedFruits = fruits.ConvertAll(s => s.ToUpper());
        List<int> lengths = fruits.ConvertAll(s => s.Length);
        
        foreach(string f in fruits) {
        
            Console.WriteLine(f);
        }
        
        foreach(int l in lengths) {
        
            Console.WriteLine(l);
        }
    }
}

Output:

banana
mango
apple
watermelon
6
5
5
10

Related C# List Examples

1. C# List add elements example
2. C# List insert elements example
3. C# List Contains example
4. C# List removing elements example
5. C# List ToArray example
6. C# List ForEach example
7. C# loop List example
8. C# List FindAll example
9. C# List Find, FindLast, FindIndex, FindLastIndex
10. C# List ConvertAll example