C#: How do you implement the composite pattern?

1public interface IComponent
2{
3    void Execute();
4}
5
6public class Leaf : IComponent
7{
8    public void Execute() => Console.WriteLine("Leaf");
9}
10
11public class Composite : IComponent
12{
13    private readonly List<IComponent> _children = new();
14
15    public void Add(IComponent c) => _children.Add(c);
16
17    public void Execute()
18    {
19        foreach (var child in _children)
20            child.Execute();
21    }
22}