private void InsertData()
        {
            IEnumerable <CardActivityModel> allModels = PostedPayments.OrderBy(pp => pp.Date);

            if (!allModels.Any())
            {
                return;
            }

            IEnumerable <CardActivity> cardActivities = allModels.Select(m => CreateActivity(m));

            Service.AddActivities(cardActivities.ToArray());
        }