	Name	Description
	ChecksTransactionLevel	Gets or sets whether this undo manager will output warnings to Trace listeners when model changes occur outside of a transaction.
	CompoundEdits	Gets a list of all of the compound edits.
	CurrentEdit	Gets the current compound edit for recording additional model change events.
	CurrentTransactionName	Gets the current transaction name given by StartTransaction.
	EditToRedo	Gets the current IUndoableEdit to be redone, or null if there is none.
	EditToUndo	Gets the current IUndoableEdit to be undone, or null if there is none.
	IsUndoingRedoing	This property is true during a call to Undo or Redo.
	MaximumEditCount	Gets or sets the maximum number of compound edits that this undo manager will remember.
	Models	Gets a list of models for which this UndoManager is recording undo/redo information.
	NestedTransactionNames	Gets a stack of ongoing transaction names.
	TransactionLevel	Gets the current transaction level.
	UndoEditIndex	Gets the index into CompoundEdits for the current undoable edit.

	Name	Description
	AddModel	Make sure this undo manager knows about a IDiagramModel for which it is receiving model Changed event notifications.
	CanRedo	This predicate is true when one can call Redo.
	CanUndo	This predicate is true when one can call Undo.
	Clear	Clear all of the UndoManager.CompoundEdits and reset all other state.
	CommitTransaction	Just call EndTransaction, committing the current transaction, with the presentation name for the transaction.
	FindPrimaryObject	Given an IUndoableEdit return an edited object that represents what was modified.
	HandleModelChanged	Create an IUndoableEdit for a Changed event.
	Redo	Restore the state of some models to after the current IUndoableEdit.
	RemoveModel	Call this method to inform this undo manager that it no longer will be notified of model Changed events.
	RollbackTransaction	Just call EndTransaction, rolling back the current transaction.
	StartTransaction	Begin a transaction, where the changes are held by a UndoManager.CompoundEdit.
	ToString	For debugging.
	Undo	Restore the state of some models to before the current IUndoableEdit.

	Name	Description
	CommitCompoundEdit	This method is called by EndTransaction when committing a compound edit.
	EndTransaction	Stop the current transaction, either rolling it back or committing it.
	SkipEvent	This predicate is responsible for deciding if a ModelChangedEventArgs is not interesting enough to be recorded.