public ShellViewModel(IWindowManager windowManager, DbConnectionManager connectionManager, FileManager fileManager, IEventAggregator eventAggregator) { _windowManager = windowManager; _connectionManager = connectionManager; _fileManager = fileManager; eventAggregator.Subscribe(this); // Populate locations from database var savedLocations = _connectionManager.QueryLocations().OrderBy(x => x.Index); Locations = new ObservableCollection <LocationModel>(savedLocations.Select(x => new LocationModel(x))); }