BiasCorrectQ.Program.DataToMonthly C# (CSharp) Method

        private static List<Point> DataToMonthly(List<Point> data)
        {
            /* if data is monthly return data, if data is daily process
             * data, otherwise print error message and get out of here */
            if (Utils.IsDataMonthly(data))
            {
            return data;
            }
            else if (Utils.IsDataDaily(data))
            {
            return DailyToMonthly(data);
            }
            else
            {
            Console.WriteLine("error: only monthly or daily inputs supported");
            return new List<Point> { };
            }
        }