public static ObservableCollection <DataPoint> GetDataPointsGraph3() { IncomeService incomeService = new IncomeService(); var asd = incomeService.getTotalIncomes(); OutcomeService outcomeService = new OutcomeService(); var asd2 = outcomeService.getTotalOutcomes(); return(new ObservableCollection <DataPoint>() { new DataPoint() { Argument = "Incomes", Value = asd }, new DataPoint() { Argument = "Outcomes", Value = asd2 } }); }