Считать веб страницу

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
 
namespace twetwo
{
    class Program
    {
        static void Main()
        {
            HttpWebRequest proxy_request = (HttpWebRequest)WebRequest.Create("http://yandex.ru");
            proxy_request.Method = "GET";
            proxy_request.ContentType = "application/x-www-form-urlencoded";
            proxy_request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.0.249.89 Safari/532.5";
            proxy_request.KeepAlive = true;
            HttpWebResponse resp = proxy_request.GetResponse() as HttpWebResponse;
            string html = "";
            using (StreamReader sr = new StreamReader(resp.GetResponseStream(), Encoding.GetEncoding(1251)))
            html = sr.ReadToEnd();
            html = html.Trim();
            Console.WriteLine(html);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
 
namespace twetwo
{
    class Program
    {
        static void Main()
        {
            HttpWebRequest proxy_request = (HttpWebRequest)WebRequest.Create("http://yandex.ru");
            proxy_request.Method = "GET";
            proxy_request.ContentType = "application/x-www-form-urlencoded";
            proxy_request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.0.249.89 Safari/532.5";
            proxy_request.KeepAlive = true;
            HttpWebResponse resp = proxy_request.GetResponse() as HttpWebResponse;
            string html = "";
            using (StreamReader sr = new StreamReader(resp.GetResponseStream(), Encoding.GetEncoding(1251)))
            html = sr.ReadToEnd();
            html = html.Trim();
            Regex reg_for_proxy = new Regex(@"(http://.\S+.\d+?)", RegexOptions.Singleline | RegexOptions.IgnoreCase);
            MatchCollection collect_math = reg_for_proxy.Matches(html);
            foreach (Match a in collect_math)
            {
 
                Console.WriteLine(a);
                string b = Convert.ToString(a);               
 
            }
            
        }
    }
}

// Create a New 'HttpWebRequest' object .
HttpWebRequest myHttpWebRequest1=(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
myHttpWebRequest1.AddRange(1000);