| Class | Description | |
|---|---|---|
 | ActionHistory | Maintains an undo/redo history. |
| ActionHistory.ActionBase | Base class that represents a single action to perform. |
| BindingListChangedEventManager | Class used to support weak event listening for the IBindingList.ListChanged event |
| ClassComparer<T> | Base class for a comparer that compares class type objects and performs the necessary null checks before calling the actual comparison routine. |
| ClipboardHelper | Static class with helper methods for interacting with the clipboard. |
| EnumerableObjectWrapper | Wraps an object that implements the System.Collections.IEnumerable interface to expose both its name and its items. |
| FocusWithinManager | Class for managing IsFocusedWithin state of ui elements of specific types. To have the FocusWithinManager manage IsFocusedWithin state for ui elements of a specific type, register that type using the RegisterType(Type) method. |
| FrameworkContentElementNotifier | Abstract base class that implements INotifyPropertyChanged on a FrameworkContentElement |
| HashSet | Data structure for use as a set. |
| NameScopeProxy | Custom System.Windows.Markup.INameScope that acts as the proxy for the namescope of an ancestor element. |
| NullableConverter<T> | Custom type converter used for nullable types. |
| StyleSelectorHelperBase | Abstract base class used to supply styles dynamically that can be triggered lazily off the Style 'get' |