using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var notebook = new Notebook { Pages = {"page1", "page2"} };

        foreach(var page in notebook.Pages)

        {

            System.Console.WriteLine(page);

        }

    }

    public class Notebook

    {

        public List<string> Pages {get; set;}

    }

}