static void Main(string[] args)
{
Publisher sparta = null;
// When we write this:
sparta?.Publish("Hello World: The Book");
// The C# compiler actually generates THIS:
// if (sparta != null) sparta.Publish("Hello World: The Book");
var randomHouse = new Publisher();
var wroxPress = new Publisher();
var darkHorse = new Publisher();
var harryPotterFan = new BookFan {
Name = "Harry", FavouriteBookSubject = "Harry Potter"
};
var dotnetFan = new BookFan {
Name = "Dylan", FavouriteBookSubject = ".NET Framework"
};
wroxPress.Publish("Advanced .NET Framework First Edition");
dotnetFan.FollowPublisher(wroxPress);
wroxPress.Publish("Advanced .NET Framework Second Edition");
dotnetFan.UnfollowPublisher(wroxPress);
wroxPress.Publish("Advanced .NET Framework Third Edition");
randomHouse.Publish("Harry Potter and the .NET Framework");
randomHouse.Publish("Harry Potter and the Sorcerer's Stone");
randomHouse.Publish("Advanced .NET Framework 4.8");
randomHouse.Publish("Scottish Tax Law 2018-2020");
}
static void Main(string[] args)
{
var randomHouse = new Publisher();
var harryPotterFan = new BookFan {
Name = "Harry", FavouriteBookSubject = "Harry Potter"
};
var dotnetFan = new BookFan {
Name = "Dylan", FavouriteBookSubject = ".NET Framework"
};
randomHouse.NewBookIsOut += harryPotterFan.ReactToNewBook;
randomHouse.NewBookIsOut += dotnetFan.ReactToNewBook;
randomHouse.Publish("Harry Potter and the .NET Framework");
randomHouse.Publish("Harry Potter and the Sorcerer's Stone");
randomHouse.Publish("Advanced .NET Framework 4.8");
randomHouse.Publish("Scottish Tax Law 2018-2020");
}
