public static void ReadSalesDataFromCSV(string pathDataDir, ref SeriesSalesData seriesSalesData)
        {
            using (StreamReader reader = new StreamReader(pathDataDir))
            {
                while (!reader.EndOfStream)
                {
                    string input = reader.ReadLine();

                    if (!input.Equals(String.Empty))
                    {
                        string[] data = input.Split(',');

                        seriesSalesData.Add(data[0], new Comic(data[1], Int32.Parse(data[2])));
                    }
                }
            }
        }