using System;

using System.Diagnostics;

using System.Text.RegularExpressions;

​

public class Program

{

​

    private static Stopwatch w = new Stopwatch();

    private static string data = "0x00 00 00 00 00 00 00 00 00 00 3A 00 F1 10 30 00 ..............09";

    public static void Main()

    {

        SubstringAndTrim1();

        SubstringAndTrim2();

        SubstringAndTrim3();

        RegExp1();

        RegExp2();

    }

    private static void SubstringAndTrim1()

    {

        w.Restart();

        string result = data.Substring(0, data.IndexOf(".")).TrimStart("0x ".ToCharArray());

        w.Stop();

        Console.WriteLine("Substring + Trim #1:\t {0}", w.Elapsed);

        Console.WriteLine(result);

        Console.WriteLine();

    }

    private static void SubstringAndTrim2()

    {

        w.Restart();

        string result = data.Substring(2).TrimStart("0 ".ToCharArray()).TrimEnd("0123456789.".ToCharArray()).Trim();;

        w.Stop();

        Console.WriteLine("Substring + Trim #2:\t {0}", w.Elapsed);

        Console.WriteLine(result);

        Console.WriteLine();

    }

    private static void SubstringAndTrim3()

    {

        w.Restart();

        string result = data.Substring(2, data.IndexOf(".") - 2).TrimStart("0 ".ToCharArray());

        w.Stop();

        Console.WriteLine("Substring + Trim #3:\t {0}", w.Elapsed);

        Console.WriteLine(result);

        Console.WriteLine();

    }

    private static void RegExp1()

    {

        w.Restart();

        var reg = new Regex(@"0x(00 )+(.+) \.");

        var match = reg.Match(data);

        string result = match.Groups[2].Value;

        w.Stop();

        Console.WriteLine("RegExp #1:\t\t\t {0}", w.Elapsed);

        Console.WriteLine(result);

        Console.WriteLine();

    }

​

    private static void RegExp2()

    {

        w.Restart();

        var reg = new Regex(@"0[x][0]+([1-90a-fA-F]+)");

        string result = "";

        foreach (Match m in reg.Matches(data.Replace(" ", String.Empty)))

        {

          if (m.Success)

          {

            result += m.Groups[1].Value;

          }

        }

        w.Stop();

        Console.WriteLine("RegExp #2:\t\t\t {0}", w.Elapsed);

        Console.WriteLine(result);

        Console.WriteLine();

    }

}