private void RedoCommandExecute(object obj)
{
inRedoCommand = true;
if (redoChangeLog.Last() is DeleteStep)
{
undoChangeLog.Record(new NewStep((DeleteStep)redoChangeLog.Last()));
}
else if (redoChangeLog.Last() is NewStep)
{
undoChangeLog.Record(new DeleteStep((NewStep)redoChangeLog.Last()));
}
redoChangeLog.MakeStep();
undoCommand.InvokeCanExecuteChanged();
redoCommand.InvokeCanExecuteChanged();
inRedoCommand = false;
}