= null) var notifyCollectionChanged = e.OldValue as INotifyCollectionChanged= null) var notifyCollectionChanged = e.NewValue as INotifyCollectionChanged= null) var notifyCollectionChanged = e.
我已经为我的INotifyCollectionChanged中的各个项目实现了INotifyPropertyChanged (可能是不正确的)和INotifyPropertyChanged。{ OnPropertyChanged();}
public class PriceLadderData : INotifyCollectionChanged