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In reading about the Observer design pattern, I noticed that it is implemented using interfaces. In Java, the java.util.observable implementation is also a class. Shouldn’t the C# and Java versions use interfaces ?
Scott
Well, it implements
INotifyCollectionChangedandINotifyPropertyChanged. However, interestingly, it doesn’t implement the newIObservable<T>interface from .NET 4.0, which you might have expected.It would arguably be useful for there to be a generic form of
INotifyCollectionChanged… but I don’t know of one.