Linear stream proccessing with PLINQ

LinearStreamProccessingWithPlinq.cs

    class Program
    {
        private const int RecordsCount = 3000;
        private static readonly Stopwatch Stopwatch = new Stopwatch();

        private const string InputDataFile =
            "C:\\Users\\Boris\\Documents\\Visual Studio 2012\\Projects\\LinearStreamProccessingWithPlinq\\PlinqTests\\DataFile1.txt";

        static void Main(string[] args)
        {
            GenerateFakeDataFile();
            Console.WriteLine("Press ENTER to finish start");
            Console.ReadLine();

            Stopwatch.Start();

            var processedRecords = GetRecordsFromFile().AsParallel().AsOrdered()
                .Select(ProccessRecord);

            foreach (var r in processedRecords)
            {
                Console.WriteLine(r.Result);
            }

            Console.WriteLine("Press ENTER to finish {0}", Stopwatch.Elapsed);
            Console.ReadLine();
        }

        private async static Task<string> ProccessRecord(string s)
        {
            // perform "compute-boud" operations
            var val = Regex.Match(s, "x(\\d+)x").Groups[1].Value;

            if (val == "666666666")
            {
                return "EXXXX-" + s;
            }

            // perform "io bound operation" (async makes sense only here)
            await StoreIntoDbAsync(val);
            return "OK-" + s;
        }


        private async static Task StoreIntoDbAsync(string dataToStore)
        {
            await Task.Delay(1000);  // call DB (1s = network latency + proccessing time)
        }

        static IEnumerable<string> GetRecordsFromFile()
        {
            using (var streamReader = new StreamReader(InputDataFile, Encoding.ASCII))
            {
                string str;
                while ((str = streamReader.ReadLine()) != null)
                {
                    yield return str;
                }
            }
        }

        static void GenerateFakeDataFile()
        {
            File.WriteAllLines(InputDataFile, Enumerable.Range(0, RecordsCount).Select(x => string.Format("x{0}x", x)));
        }
}