ASP.NET2.0 c# 获取浏览器,IP,URL,操作系统

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Text;
using System.IO;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //获取URL地址
        string url = Request.Url.ToString();
        txtUrl.Text = url;
        //获取IP地址
        string ips= Request.UserHostAddress.ToString();
        txtIp.Text = ips;
        //浏览器
        string fr = Request.Browser.Type.ToString();
      // txtbrows.Text = fr;
        string cp ;//= Request.UserAgent.ToString()
        cp=GetOSNameByUserAgent(Request.UserAgent.ToString());