Bot Problem

URL: https://stackoverflow.com/questions/26862030/can-we-detect-when-google-bot-crawl-my-page-asp-net

 If(Request.Browser.Crawler) Then

    'this is a web bot
Else
    'this is a regular user
End If

public class Utility
{
public static bool IsCrawlByBot()
    {
        List<string> Crawlers = new List<string>()
        {
            "googlebot","bingbot","yandexbot","ahrefsbot","msnbot","linkedinbot","exabot","compspybot",
            "yesupbot","paperlibot","tweetmemebot","semrushbot","gigabot","voilabot","adsbot-google",
            "botlink","alkalinebot","araybot","undrip bot","borg-bot","boxseabot","yodaobot","admedia bot",
            "ezooms.bot","confuzzledbot","coolbot","internet cruiser robot","yolinkbot","diibot","musobot",
            "dragonbot","elfinbot","wikiobot","twitterbot","contextad bot","hambot","iajabot","news bot",
            "irobot","socialradarbot","ko_yappo_robot","skimbot","psbot","rixbot","seznambot","careerbot",
            "simbot","solbot","mail.ru_bot","spiderbot","blekkobot","bitlybot","techbot","void-bot",
            "vwbot_k","diffbot","friendfeedbot","archive.org_bot","woriobot","crystalsemanticsbot","wepbot",
            "spbot","tweetedtimes bot","mj12bot","who.is bot","psbot","robot","jbot","bbot","bot"
        };

        string ua = HttpContext.Current.Request.UserAgent.ToLower();
        bool iscrawler = Crawlers.Exists(x => ua.Contains(x));
        return iscrawler;
    }
}

protected void Application_BeginRequest(Object sender, EventArgs e)
        {
            //if (!Request.Browser.Crawler)
            if (!Utility.IsCrawlByBot())
            {
                string strCountryCookie = BBAreman.CountryCookie.GetCookieValue();
                string strShippingCookie = BBAreman.CountryCookie.GetShippingCookieValue();
                if (Request.Url.ToString().IndexOf(".asmx") == -1)
                {
                    if (strCountryCookie.Trim() == "" || strShippingCookie.Trim() == "")
                    {
                        if (Request.Url.GetLeftPart(UriPartial.Authority).ToString() + "/index.aspx?ShowCountry=true" != HttpContext.Current.Request.Url.ToString())
                        {
                            Response.Redirect("~/index.aspx?ShowCountry=true");