using System;

using System.Text.RegularExpressions;

using System.Collections.Generic;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

​

        string material_string = @"<TABLE height=100%>\r\n<TBODY>\r\n<TR>\r\n<TD>\r\n<DIV id=lmid>Лист 29НК-10 ГОСТ 14082-78</DIV></TD>\r\n<TD style=BORDER-BOTTOM-WIDTH: 1px>\r\n<DIV id=righted style=DISPLAY: none>\r\n<TABLE>\r\n<TBODY>\r\n<TR>\r\n<TD style=BORDER-BOTTOM: #000 1px solid>\r\n<DIV id=rtop></DIV></TD></TR>\r\n<TR>\r\n<TD>\r\n<DIV id=rdown></DIV></TD></TR></TBODY></TABLE></DIV></TD></TR></TBODY></TABLE><!--CADЛист 29НК-10 ГОСТ 14082-78-->";

        //material_string = @"Деталь_5_тест Лист";

        string pattern = @"<DIV id=lmid>(|.+?)</DIV>";

        string pattern2 = @"<DIV id=rdown>(|.+?)<\/DIV>";

        string res = "";

​

        Regex r = null;

        Match m = null;

        r = new Regex(pattern, RegexOptions.IgnoreCase | RegexOptions.Singleline);

        m = r.Match(material_string);

        res = m.Groups[1].ToString();

        res = res.Replace(" ", " ").Trim();

        Console.WriteLine(m.Groups[0].ToString() + "___" + m.Groups.Count.ToString() + " " + res);

​

        r = new Regex(pattern2, RegexOptions.IgnoreCase | RegexOptions.Singleline);

        m = r.Match(material_string);

        res = m.Groups[1].ToString();

        res = res.Replace(" ", " ").Trim();

        Console.WriteLine(m.Groups[0].ToString() + "___" +m.Groups.Count.ToString() + " " + res);

​

        /*do

        {

            m = r.Match(material_string);

            res += "\n"+ m.ToString().Trim();

            //Console.WriteLine(m.ToString().Length.ToString());

            //Console.WriteLine(m.ToString().Trim().Length.ToString());

            //Console.WriteLine(m.ToString().Trim());

            material_string = material_string.Substring(m.ToString().Trim().Length).Trim();

            //Console.WriteLine(material_string.Length.ToString().Trim());

        }

        while (material_string.Length > 0);

        Console.WriteLine(res);*/

    }

}