C#  Copy Code
public CommandHistory History { get; }

Visual Basic  Copy Code
Public ReadOnly Property History As CommandHistory

 Property Value

History represents the undo manager's queue of action records. This queue provides access to the NextUndo and NextRedo records. You could set the queue's Capacity, specifying how many records can be added to the queue before the oldest ones start to drop off its end.

UndoManager Members
UndoManager Class
MindFusion.Diagramming Namespace
Command class