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How to handle them may vary, depending on what you're doing and what you're looking to accomplish, but WPF comes with two very easy solutions that you can use: The Observable Collection and the INotify Property Changed interface.I have a project, where I bind a checkbox's Is Checked property with a get/set in the codebehind.However, when the application loads, it doesn't update, for some reason. Code is a little difficult to read and you make no reference to your XAML. _Song Library = New Observable Collection(Of ASong) End Sub End Class When I add a song, it doesn't show up in the List View (actually, even the List View doesn't show up upon start. You would also normally have an Update Source Trigger set to Property Changed in your XAML on the control that is using your Songs collection as its Items Source.