System.Object
   ESRI.ArcGIS.Client.WebMap.Popup.CodedValueDomainConverter
   ESRI.ArcGIS.Client.WebMap.Popup.CodedValueSource
   ESRI.ArcGIS.Client.WebMap.Popup.DynamicCodedValueSourceConverter
   ESRI.ArcGIS.Client.WebMap.Popup.DynamicCodedValueSourceLookupConverter
   ESRI.ArcGIS.Client.WebMap.Popup.HtmlToPlainTextConverter
   ESRI.ArcGIS.Client.WebMap.Popup.LabelAttributeConverter
   ESRI.ArcGIS.Client.WebMap.Popup.UrlAttributeConverter
   System.Collections.Generic.Dictionary<TKey,TValue>
      ESRI.ArcGIS.Client.WebMap.Popup.DynamicCodedValueSource
      ESRI.ArcGIS.Client.WebMap.Popup.FieldDomainCollection
   System.Collections.Generic.List<T>
      ESRI.ArcGIS.Client.WebMap.Popup.CodedValueSources
   System.Windows.Controls.ListBox
      System.Windows.Controls.Primitives.Selector
         System.Windows.Controls.ItemsControl
            System.Windows.Controls.Control
               System.Windows.FrameworkElement
                  System.Windows.UIElement
                     System.Windows.Media.Visual
                        System.Windows.DependencyObject
                           System.Windows.Threading.DispatcherObject
                              ESRI.ArcGIS.Client.WebMap.Popup.ItemSelector
   System.Windows.Controls.ListBoxItem
      System.Windows.Controls.ContentControl
         System.Windows.Controls.Control
            System.Windows.FrameworkElement
               System.Windows.UIElement
                  System.Windows.Media.Visual
                     System.Windows.DependencyObject
                        System.Windows.Threading.DispatcherObject
                           ESRI.ArcGIS.Client.WebMap.Popup.ItemSelectorItem

Reference

ESRI.ArcGIS.Client.WebMap Assembly