public Library() { Catalog = new List <Item>(); Item b1 = new Book("How Much of These Hills Is Gold", "C Pam Zhang", 2020, 368); Item b2 = new Book("Jade City", "Fonda Lee", 2017, 560); Item b3 = new Book("The Poppy War", "R F Kuang", 2018, 544); Item b4 = new Book("Beowulf: A New Translation", "Maria Dahvana Headley", 2020, 176); Item b5 = new Book("Pachinko", "Min Jin Lee", 2017, 490); Catalog.Add(b1); Catalog.Add(b2); Catalog.Add(b3); Catalog.Add(b4); Catalog.Add(b5); Item c1 = new CD("1", "The Beatles", 2000, 27); Item c2 = new CD("Thriller", "Michael Jackson", 1982, 9); Item c3 = new CD("21", "Adele", 2011, 11); Catalog.Add(c1); Catalog.Add(c2); Catalog.Add(c3); Item d1 = new DVD("Finding Nemo", "Andrew Stanton (Pixar)", 2003, 100); Item d2 = new DVD("Spider-Man", "Sam Raimi (Sony Pictures)", 2002, 121); Item d3 = new DVD("Avatar", "James Cameron (20th Century Fox)", 2009, 162); Catalog.Add(d1); Catalog.Add(d2); Catalog.Add(d3); Item mag1 = new Magazine("They're Making Another Super Mario Movie", "WIRED", 2018, 8); Item mag2 = new Magazine("The World's Rarest Pair of Tweezers", "Collectors", 2015, 9); Item mag3 = new Magazine("Mount Everest: The Secrets it Holds", "National Geographic", 1999, 2); Catalog.Add(mag1); Catalog.Add(mag2); Catalog.Add(mag3); }