控制反转 (inversion of control)

The inversion of control (IoC) pattern is abstract; it says that one should move dependency creation
out of the consumer class, but it doesn’t talk about exactly how to achieve that.

public class EmailService{public void SendMessage() { ... }}

public interface IMessagingService{void SendMessage();}public class EmailService : IMessagingService{public void SendMessage() { ... }}public class NotificationSystem{private IMessagingService svc;public NotificationSystem(){svc = new EmailService();}public void InterestingEventHappened(){svc.SendMessage();}}

原标题：控制反转 (inversion of control)

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