BudgetAnalyser.Engine.Services.TransactionManagerService.DetectDuplicateTransactions C# (CSharp) Method

        public string DetectDuplicateTransactions()
        {
            if (StatementModel == null)
            {
                return null;
            }

            List<IGrouping<int, Transaction>> duplicates = StatementModel.ValidateAgainstDuplicates().ToList();
            return duplicates.Any()
                ? string.Format(CultureInfo.CurrentCulture, "{0} suspected duplicates!",
                    duplicates.Sum(group => group.Count()))
                : null;
        }