System.Object
   System.Collections.CollectionBase
      Xceed.Chart.ChartToolbarButtonsArray
   System.EventArgs
      Xceed.Chart.PrintEventArgs
   System.MarshalByRefObject
      System.ComponentModel.Component
         System.Windows.Forms.Control
            System.Windows.Forms.ScrollableControl
               System.Windows.Forms.ContainerControl
                  System.Windows.Forms.UserControl
                     Xceed.Chart.ChartGridControl
            Xceed.Chart.ChartControl
            Xceed.Chart.UIControls.ToolBar
               Xceed.Chart.ChartToolbarControl
   Xceed.Chart.ChartWizard
   Xceed.Chart.Core.ChartControlStateBase
      Xceed.Chart.ChartControlState
   Xceed.Chart.Licenser
   Xceed.Chart.PrintManager

Reference

Xceed.Chart.v4.4 Assembly