private void ShowPagination()
        {
            var margin = Pagination.Margin;

            Pagination.BeginAnimation(MarginProperty, new ThicknessAnimation(
                                          margin,
                                          new Thickness(margin.Left, margin.Top, margin.Right, 50),
                                          new Duration(TimeSpan.FromMilliseconds(300))));
        }
        private void HidePagination()
        {
            var margin = Pagination.Margin;

            Pagination.BeginAnimation(MarginProperty, new ThicknessAnimation(
                                          margin,
                                          new Thickness(margin.Left, margin.Top, margin.Right, -(Pagination.ActualHeight + 10)),
                                          new Duration(TimeSpan.FromMilliseconds(300))));
        }