private void SeriesOnSelectionChanged(object sender, SelectionChangedEventArgs selectionChangedEventArgs) { if (selectionChangedEventArgs.AddedItems.Count < 1) { return; } var lineSeries = (LineSeries)sender; Controller.SelectedSeriesData = (SeriesData)lineSeries.DataContext; Controller.SelectedPlotPoint = (DatedGraphPlot)selectionChangedEventArgs.AddedItems[0]; }