public OperationManager OperationManager {get;}

// Demonstrates how to undo and redo the most recent operation using the map's operation manager.
  //undo
  if (activeMap.OperationManager.CanUndo)
    activeMap.OperationManager?.UndoAsync();//await as needed

  //redo
  if (MapView.Active.Map.OperationManager.CanRedo)
    activeMap.OperationManager?.RedoAsync();//await as needed
}