private DataSet GetData() { DateTime startDate = dteStartDate.SelectedDate.Value; DateTime endDate = dteEndDate.SelectedDate.Value; Facade.IOrganisation facOrganisation = new Facade.Organisation(); Func <DateTime, string> dateFormatter = (dateTime) => string.Format("{0} {1}", dateTime.ToString("MMM"), dateTime.Year); return(facOrganisation.GetClientRevenuePerMonthReport(startDate, endDate, IncludeTotalsPerClient, IncludeTotalsPerMonth, dateFormatter)); }