public void MoveToPreviousPage()
        {
            if (IsWizardPage)
            {
                if (wizardProvider.MoveToPreviousPage())
                {
                    return;
                }
            }
            else if (IsLastPage && wizardProvider.HasWizard && wizardProvider.CurrentWizard.TotalPages != 0)
            {
                IsLastPage = false;
                return;
            }

            IsFirstPage = true;
            IsLastPage  = false;
        }