System.Object
   C1.WPF.ExpressionEditor.BaseRule
      C1.WPF.ExpressionEditor.RegexRule
         C1.WPF.ExpressionEditor.FieldRule
         C1.WPF.ExpressionEditor.FunctionsRule
         C1.WPF.ExpressionEditor.KeyWordsRule
         C1.WPF.ExpressionEditor.NumberRule
         C1.WPF.ExpressionEditor.StringRule
   C1.WPF.ExpressionEditor.CommandHandler
   C1.WPF.ExpressionEditor.ExpressionEditorCollection
   C1.WPF.ExpressionEditor.ExpressionItemCategory
   C1.WPF.ExpressionEditor.IntellisenseItem
   C1.WPF.ExpressionEditor.Token
   System.Collections.Generic.List<T>
      C1.WPF.ExpressionEditor.RuleCollection
   System.EventArgs
      C1.WPF.ExpressionEditor.WordEventArgs
         C1.WPF.ExpressionEditor.WordLocationEventArgs
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     C1.WPF.ExpressionEditor.C1ExpressionEditor
                     C1.WPF.ExpressionEditor.C1ExpressionEditorPanel
                     System.Windows.Controls.Primitives.TextBoxBase
                        System.Windows.Controls.RichTextBox
                           C1.WPF.ExpressionEditor.C1ExpressionRichTextBox

Reference

C1.WPF.ExpressionEditor.4.5.2 Assembly