System.Object
   C1.WPF.SpellChecker.C1SpellChecker
   C1.WPF.SpellChecker.CharRange
   C1.WPF.SpellChecker.SpellDictionaryBase
      C1.WPF.SpellChecker.SpellDictionary
      C1.WPF.SpellChecker.UserDictionary
   C1.WPF.SpellChecker.SpellOptions
   System.Collections.Generic.Dictionary<TKey,TValue>
      C1.WPF.SpellChecker.WordDictionary
   System.Collections.Generic.List<T>
      C1.WPF.SpellChecker.CharRangeList
   System.Collections.ObjectModel.Collection<T>
      System.Collections.ObjectModel.KeyedCollection<TKey,TItem>
         C1.WPF.SpellChecker.WordList
   System.EventArgs
      C1.WPF.SpellChecker.BadWordEventArgs
      C1.WPF.SpellChecker.ContextMenuEventArgs
      System.ComponentModel.AsyncCompletedEventArgs
         C1.WPF.SpellChecker.CheckControlCompletedEventArgs
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     System.Windows.Controls.ContentControl
                        C1.WPF.C1HeaderedContentControl
                           C1.WPF.C1Window
                              C1.WPF.SpellChecker.C1SpellDialog

Reference

C1.WPF.SpellChecker.4.5.2 Assembly