Command

Represents an action that modifies an object and whose effects can be undone.

CompositeCommand

Represents a set of Command instances as a single operation.Undoing or redoing the composite action, respectively undoes or redoes all its constituent subactions at the same time.

DisposableCommand

Represents a command that implements the IDisposable interface.

TrackChangesCommand

Represents a command that can track and undo changes of INotifyPropertyValueChanged objects.

UndoEventArgs

Contains the arguments passed to the ActionUndone and ActionRedone event handlers.