using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
  class Program
  {
    static void Main(string[] args)
    {

      WebClient wc = new WebClient();
      wc.Encoding = Encoding.UTF8;
      string html = wc.DownloadString("http://www.lagou.com/");

      MatchCollection matches = Regex.Matches(html, "<a.*jobs.*>(.*)</a>");
      foreach (Match item in matches)
      {
        Console.WriteLine(item.Groups[1].Value);
      }
      Console.WriteLine(matches.Count);
      Console.ReadKey();  
    }
  }
}