using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BooksLambda
{
    public class Program
    {
        static void Main(string[] args)
        {
            var books = new BookRepository().GetBooks();
            //var cheapBooks = books.FindAll(IsCheaperThan10Dollars);
            var cheapBooks = books.FindAll(b => b.Price<10);

            foreach (var book in cheapBooks)
            {
                Console.WriteLine(book.Title);
            }
        }

        //static bool IsCheaperThan10Dollars(Book book)
        //{
        //    return book.Price < 10;
        //}
    }

    public  class BookRepository
    {
        public List<Book> GetBooks()
        {
            return new List<Book>
            {
                new Book(){Title="Title 1", Price=5.25m},
                new Book(){Title="Title 2", Price=9.25m},
                new Book(){Title="Title 3", Price=10.75m}
            };
        }
    }

    public class Book
    {
        public string Title { get; set; }
        public decimal Price { get; set; }
    }
}