INotifyCollectionChanged: Added item does not appear at given index '0'

Question

I\'m making a observable class. The Add methods works fine. But then I\'m trying to call the Remove() method I get this error:

\"Added item does not a

Answer 1

Are you sure the error is with the Remove method? The error message and your source code indicate it is in the Add method. Try using the correct index _list.Count - 1 in the constructor of NotifyCollectionChangedEventArgs:

CollectionChanged(this, new NotifyCollectionChangedEventArgs(
                                              NotifyCollectionChangedAction.Add, 
                                              orderResponse, _list.Count - 1)
                 );