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• Iterating through items of CompositeCollection

  - by Dudu

  Consider the code: ObservableCollection<string> cities = new ObservableCollection<string>(); ObservableCollection<string> states = new ObservableCollection<string>(); ListBox list; cities.Add("Frederick"); cities.Add("Germantown"); cities.Add("Arlington"); …

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• Can a WPF ComboBox display alternative text when its selection is null?

  - by Garth T Kidd

  G'day! I want my WPF ComboBox to display some alternative text when its data-bound selection is null. The view model has the expected properties: public ThingoSelectionViewModel : INotifyPropertyChanged { public ThingoSelectionViewModel(IProvideThingos) { this.Thingos = IProvideThingos.GetThingos(); } …

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