问题:
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList.
You need to ensure that changes to ProductList are automatically reflected in the ListBox control.
What should you do? ()
A . Implement the INotifyPropertyChanged interface in the Product class.
B . Implement the IQueryable<Product> interface in the ProductList class.
C . Extend the DependencyObject class in the Product class.
D . Extend the ObservableCollection<Product> class in the ProductList class.
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList.
You need to ensure that changes to ProductList are automatically reflected in the ListBox control.
What should you do? ()
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