How to detect a user's culture dynamically?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
//add this namespace
using System.Globalization;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //How to detect  User's Culture dynamically?
        string a = Request.UserLanguages[0];
        CultureInfo c = new CultureInfo(a);
        Response.Write(c.EnglishName + "---" + c.Name);


    }
}