Google caches Error 404 page for localized website

Question

User-314535079 posted

Hi,

I have an ASP.Net(2.0) website which I have localized based on user's browser settings. So when a user navigates to my website, I check their browser settings and redirect them.

Here's the code which I have in global.asax

protected void Session_Start(object sender, EventArgs e)
{          
    string localeName = ResourceHelper.GetCulture();
    string refUrl = HttpContext.Current.Request.Url.ToString();

    if (localeName.ToLower() != "en-us")
    {
        if (!refUrl.Contains("in"))
            HttpContext.Current.Response.Redirect("/in/Default.aspx");
    }
    else
    {
        if (refUrl.Contains("in"))
            HttpContext.Current.Response.Redirect("/Default.aspx");
    }
} 

 My problem is that on google, my 404 error page is being cached and the error page title comes up as the search result.

I think because of the way I redirect users, the search crawler gets to the error page instead of the homepage. How can I fix this?

Any help is appreciated. Thanks!