public void Detach(NotifyChangeEventHandler ohandler) { this.NotifyChanged -= ohandler; }
public void UnRegister(NotifyChangeEventHandler handler) { this.Detach(handler); }
public void Attach(NotifyChangeEventHandler ohandler) { this.NotifyChanged += ohandler; }
public void Register(NotifyChangeEventHandler handler) { this.Attach(handler); }