static void Main(string[] args) { var number = new Nullable <int>(); Console.WriteLine("Has Value ?" + number.HasValue); Console.WriteLine("Value: " + number.GetValueOrDefault()); //Book book = new Book(); //var numbers = new List(); //numbers.Add(10); //var books = new BookList(); //books.Add(book); var numbers = new GenericList <int>(); numbers.Add(10); var books = new GenericList <Book>(); books.Add(new Book()); var dictionary = new GenericDictionary <string, Book>(); dictionary.Add("1234", new Book()); }
static void Main(string[] args) { Book myBook = new Book(123456789, "The Wind in the Willows", 3.99F); GenericList <Book> myBookList = new GenericList <Book>(); myBookList.Add(myBook); //location of all generic collection types //System.Collections.Generic. GenericDictionary <string, Book> myGenDictExample = new GenericDictionary <string, Book>(); myGenDictExample.Add("1234", myBook); var mynumber = new Nullable <int>(5); Console.WriteLine("My Number Has Valeu? : " + mynumber.HasValue); Console.WriteLine("MyNumber has value of ? : " + mynumber.GetValueOrDefault()); Console.ReadLine(); }