public void CalculateSum() { long spentHours = 0; Sheets.ForEach(sheet => spentHours += sheet.SpentHours); _ = Contract?.CostHourWork ?? throw new NullReferenceException($"{nameof(Contract.CostHourWork)}"); Sum = Contract.CostHourWork * spentHours; }
private void SetPage(int currentIndex) { Sheets.ForEach(x => x.IsCurrent = false); Sheets[currentIndex].IsCurrent = true; }