How to split listbox item text ?

DataTable dataTable = new DataTable();
            dataTable.Columns.Add("Hello");
            dataTable.Columns.Add("Number");
            //dataTable.Columns.Add("Age");
            string filePath = "D:\\codepro.txt";
            StreamReader streamReader = new StreamReader(filePath);
            string[] totalData = new string[File.ReadAllLines(filePath).Length];
            totalData = streamReader.ReadLine().Split(',');
            while (!streamReader.EndOfStream)
            {
                totalData = streamReader.ReadLine().Split(',');
                dataTable.Rows.Add(totalData[0], totalData[1]);
            }