This will do your work
void GetQuote()
{
WebClient wb = new WebClient();
string htmldoc= wb.DownloadString("http://www.tikr.ru/");
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(htmldoc);
HtmlAgilityPack.HtmlNode node = doc.DocumentNode.SelectSingleNode("//span[@id=\"csPrice\"]");
string quote = node.InnerText;
}
Here the 'quote' directly displays the today's quote i.e 1519.95 .
:)