public IEnumerable <MonitoringItems> FindByPriceCategory(string amount, string belowOrAbove) { if (belowOrAbove == "ABOVE") { return(ProductConfigureSupporterFunctions.GetItemsAboveThanGivenPrice(amount, MonitoringItems)); } return(ProductConfigureSupporterFunctions.GetItemsBelowThanGivenPrice(amount, MonitoringItems)); }