c# - Do not allow unselect/deselect in ListBox

Question

Is there a way to configure the WPF ListBox such that it's not possible to deselect/unselect an item? So there is always an item selected?

My ListBox binds to an ObservableCollection<MyClass>.

Answer 1

You can handle the SelectionChanged event and set a selection if the SelectedItem evaluates to null. To reselect an item that has been unselected you can keep track of the last selected item in a private field, which should always be updated in the SelectionChanged event.