using System;

using System.Text.RegularExpressions;

​

public class Program

{

    static string sLog ="1      2   sdfkjh  2015-02-01 00:00:00 1631632673  6367364 MOD GPAS ISDN=\"996773456149\", CHARGE_GLOBAL=NONE PROV=TRUE CNT}    SUCCESS0002: 129837129387128937\n"+

                        "                                                           CI1 PDPTYPE=IPV4, ADDIND=DYNAMIC, RELCLS=ACKALCPRODT, DELAY\n"+

                        "                                                           CLS=DELAY1, PRECLS=NORMAL, PEAKTHR=256000 OCT\n"+

                        "2      2   sdfkjh  2015-02-01 00:00:00 1631632673  6367364 lEANTHA=BEST_EFFORT, ARPRIORITY=NORMAL, ERASDU=NO, DELIVERY=NO       SUCCESS0001: qweqwe\n"+

                        "3      2   sdfkjh  2015-02-01 00:00:00 1631632673  6367364 lEANTHA=BEST_EFFORT, ARPRIORITY=NORMAL, ERASDU=NO, DELIVERY=NO       SUCCESS0001: qweqwe\n"+

                        "4      2   sdfkjh  2015-02-01 00:00:00 1631632673  6367364 lEANTHA=BEST_EFFORT, ARPRIORITY=NORMAL, ERASDU=NO, DELIVERY=NO       SUCCESS0001: qweqwe\n"+

                        "5      2   sdfkjh  2015-02-01 00:00:00 1631632673  6367364 lEANTHA=BEST_EFFORT, ARPRIORITY=NORMAL, ERASDU=NO, DELIVERY=NO       SUCCESS0001: qweqwe\n";

    public static void Main()

    {

        Regex   re=new Regex(@"\d+\s+\d+\s+\w+\s+\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2}\s+\d+\s\d+\s(.*?)SUCCESS\d{4}.*?\n(?:\s+?(\S.*?)\n)?(?:\s+?(\S.*?)\n)?(?:\s+?(\S.*?)\n)?(?:\s+?(\S.*?)\n)?", RegexOptions.Singleline);

        Match   m;

        m = re.Match(sLog);

        while (m.Success)

        {

            Console.WriteLine(m.Groups[1].Value + m.Groups[2] + m.Groups[3] + m.Groups[4] + m.Groups[5]);

            m = m.NextMatch();

        }

    }

}