How to fetch header info from given url

In this post I will show how to fetch header info from given url

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;

namespace SNIPPET_CS
{
    public class HeaderInfo
    {
        public string Key { get; set; }
        public string Value { get; set; }

        public static List<HeaderInfo> GetHttpResponseHeaders(string url)
        {
            List<HeaderInfo> headerList = new List<HeaderInfo>();
            WebRequest webRequestObject = WebRequest.Create(url);
            WebResponse responseObject = webRequestObject.GetResponse();
            if (responseObject != null)
            {
                headerList.AddRange(from string headerKey in responseObject.Headers
                                    select new HeaderInfo()
                                               {
                                                   Key = headerKey,
                                                   Value = responseObject.Headers[headerKey]
                                               });
                responseObject.Close();
            }

            return headerList;
        }

    }
    class Program
    {
        static void Main(string[] args)
        {

            // Retrieve headers:
            var headers = HeaderInfo.GetHttpResponseHeaders("http://www.google.com");

            // And output them:
            foreach (HeaderInfo headerKey in headers)
                Console.WriteLine("{0}: {1}", headerKey.Key, headerKey.Value);
        }
    }
}