How can I extract data from a log file?

using System;
using System.IO;
using System.Text.RegularExpressions;

class Program
{

    public struct command
    {  
        public int com, side, clientAppliId, quantity, price, validity;
        public int modality, clientCodeType, subNegociationCode, subClassOrder;
        public int origTime, tradingPhase, postingMode, clearingMode, TON, restriction, settlementType;
        public int applicationFlag, mnemo, GLID, typeMessage, classOrder, noUti;
        public string currency, confirmation;
    }

    static void Main()
    {
        Regex g = new Regex(@"(?<h>\d+):(?<min>\d+):(?<sec>\d+):(?<ms>\d+)+ GLDataCmd");
        Regex g2=new Regex(@"SCRecord");
        Regex g2_fin = new Regex(@"}");

        using (StreamReader r = new StreamReader("C:\\Program Files\\GLTrade\\slev5\\log\\P10_P3_recv_20110817.log"))
        {
            string line;

            while ((line = r.ReadLine()) != null)
            {
              Match m=g.Match(line);
              
                if ( m.Success)
                {
                    Console.WriteLine(line);
                  
                    while ((line = r.ReadLine()) != null)
                    {
                        Match c = g2.Match(line);
                        if (c.Success)
                        { 
                            Console.WriteLine(line);
                            while ((line = r.ReadLine()) != null)
                            {
                                Match k = g2_fin.Match(line);
                                if (!k.Success)
                                { 
                                    Console.WriteLine(line);

                                }
                                else { break; }
                            }
                           break;
                        }
                    }
                    //string v = m.Groups[1].Value;
                    //string w = m.Groups[2].Value;
                }
            }
            Console.ReadLine();
        }
    }
}