/// <summary>
/// Adds a series to the plot area and injects chart services.
/// </summary>
/// <param name="series">The series to add to the plot area.</param>
private void AddSeriesToPlotArea(ISeries series)
{
series.SeriesHost = this;
var chartLegendItems = (AggregatedObservableCollection <object>)LegendItems;
int indexOfSeries = Series.IndexOf(series);
chartLegendItems.ChildCollections.Insert(indexOfSeries, series.LegendItems);
}
