BiasCorrectQ.Program.GetCsvData C# (CSharp) Method

        private static List<Point> GetCsvData(string filename)
        {
            var rval = new List<Point> { };

            string[] lines = File.ReadAllLines(filename);
            for (int i = 0; i < lines.Length; i++)
            {
            string[] line = lines[i].Split(',');

            DateTime dt;
            if (!DateTime.TryParse(line[0], out dt))
            {
                Console.WriteLine("error parsing date at row: " + (i + 1));
                return new List<Point> { };
            }

            double val;
            if (!double.TryParse(line[1], out val))
            {
                Console.WriteLine("error parsing value at row: " + (i + 1));
                return new List<Point> { };
            }

            if (val < 0)
            {
                Console.WriteLine("error: data contains negative values that" +
                                  " are incompatible with fitting of log normal distribution");
                return new List<Point> { };
            }

            Point pt = new Point(dt, val);
            rval.Add(pt);
            }

            return rval;
        }