C# (CSharp) Singleton SingletonMagicBook примеры использования

Пример #1

 public GoblinWizard()
 {
     Book = SingletonMagicBook.Instance();
 }

Пример #2

 public ElfWizard()
 {
     Book = SingletonMagicBook.Instance();
 }

Пример #3

 // we need to protect this method somehow
 public static SingletonMagicBook Instance()
 {
     return(uniqueInstance ?? (uniqueInstance = new SingletonMagicBook()));
 }