System.Object
   C1.Xamarin.Forms.Chart.ChartDataPoint
   C1.Xamarin.Forms.Chart.ChartHitTestInfo
   C1.Xamarin.Forms.Chart.ChartPlotElement
   C1.Xamarin.Forms.Chart.ChartTooltipLoadingEventArgs
   C1.Xamarin.Forms.Chart.DataLabelLoadingEventArgs
   C1.Xamarin.Forms.Chart.DependencyPropertyChangedEventArgs
   C1.Xamarin.Forms.Chart.ElementSize
   System.EventArgs
      C1.Xamarin.Forms.Chart.SeriesEventArgs
      System.ComponentModel.CancelEventArgs
         C1.Xamarin.Forms.Chart.BaseRenderEventArgs
            C1.Xamarin.Forms.Chart.AxisLabelLoadingEventArgs
            C1.Xamarin.Forms.Chart.RenderEventArgs
            C1.Xamarin.Forms.Chart.RenderNodeEventArgs
            C1.Xamarin.Forms.Chart.SymbolEventArgs
   Xamarin.Forms.BindableObject
      C1.Xamarin.Forms.Chart.ChartAxis
      C1.Xamarin.Forms.Chart.ChartOptions
      C1.Xamarin.Forms.Chart.ChartSeries
         C1.Xamarin.Forms.Chart.Histogram
      C1.Xamarin.Forms.Chart.ChartStyle
      C1.Xamarin.Forms.Chart.DataLabelBase
         C1.Xamarin.Forms.Chart.ChartDataLabel
         C1.Xamarin.Forms.Chart.PieDataLabel
      Xamarin.Forms.Element
         Xamarin.Forms.NavigableElement
            Xamarin.Forms.VisualElement
               Xamarin.Forms.View
                  Xamarin.Forms.Layout
                     Xamarin.Forms.Layout<T>
                        C1.Xamarin.Forms.Chart.ChartBase
                           C1.Xamarin.Forms.Chart.C1TreeMap
                           C1.Xamarin.Forms.Chart.FlexChart
                           C1.Xamarin.Forms.Chart.FlexPie
                              C1.Xamarin.Forms.Chart.C1Sunburst
                     Xamarin.Forms.TemplatedView
                        Xamarin.Forms.ContentView
                           Xamarin.Forms.Frame
                              C1.Xamarin.Forms.Chart.ChartTooltip

Reference

C1.Xamarin.Forms.Chart Assembly