正则方式的自动小偷抓网程序

object>/div>/div>
/div>

div class="share">div class="linkshare" style="right: 0">

MatchCollection mc = Regex.Matches(ghoPage.Trim(), @"(?=div class=['""]txtmsg['""]>)[\s\S]*?(?=div class=['""]share['""]>div class=)", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
foreach (Match mm in mc)
{
sb.Append(mc[0].Value.Substring(1933, mc[0].Value.Length - 1933));
}