System.Object
   System.EventArgs
      C1.WPF.FlexViewer.ContextMenuPopupEventArgs
      C1.WPF.FlexViewer.HyperlinkHoveredEventArgs
      C1.WPF.FlexViewer.OperationErrorEventArgs
      C1.WPF.FlexViewer.SearchActionEventArgs
      System.ComponentModel.CancelEventArgs
         C1.WPF.FlexViewer.HyperlinkClickedEventArgs
         C1.WPF.FlexViewer.OutlineClickedEventArgs
   System.Exception
      C1.WPF.FlexViewer.FlexViewerException
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     C1.WPF.FlexViewer.C1FlexViewer
                     C1.WPF.FlexViewer.MainToolbar
                     C1.WPF.FlexViewer.NotificationBar
                     C1.WPF.FlexViewer.SearchToolbar
                  System.Windows.Controls.Page
                     C1.WPF.FlexViewer.OutlinesView
                     C1.WPF.FlexViewer.PageSettingsView
                     C1.WPF.FlexViewer.ParametersView
                  System.Windows.Interop.HwndHost
                     C1.WPF.DxToolkit.DxHost
                        C1.WPF.FlexViewer.C1FlexViewerPane

Reference

C1.WPF.FlexViewer.4.6.2 Assembly