System.Object
   C1.Xaml.Document.FlexChart.ChartBase
      C1.Xaml.Document.FlexChart.Chart
   C1.Xaml.Document.FlexChart.ChartTitle
   C1.Xaml.Document.OwnedObject
      C1.Xaml.Document.FlexChart.Axis
      C1.Xaml.Document.FlexChart.DataLabelBase
         C1.Xaml.Document.FlexChart.DataLabel
   System.Collections.ObjectModel.Collection<T>
      C1.Xaml.Document.OwnedCollectionBase<TItem>
         C1.Xaml.Document.OwnedCollection<TItem>
            C1.Xaml.Document.FlexChart.SeriesCollection

Reference

C1.UWP.Document Assembly