Gets or sets the undo-system. Usually this is the undosystem of the Project containing this model.

public UndoRedoSystem Undo { get; set; }

Public Property Undo As UndoRedoSystem
	Get
	Set

public:
property UndoRedoSystem^ Undo {
	UndoRedoSystem^ get ();
	void set (UndoRedoSystem^ value);
}