public async Task YearsChangeAsync() { var api = ((App)App.Current).CurrentIntrataApiClient; YearBase filter = new YearBase() { instalacjaid = SelectedInstallation.DataDB.id }; List <YearBase> years = await api.GetCollectionsAsync <YearBase>(filter, ApiServices.ApiInstallationYears(), false, ""); Years = new ObservableCollection <YearViewModel>(years.Select(e => new YearViewModel(e))); }