GetResponse throwing error help

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proxy

exceptions

I'm trying to do a multithreaded proxychecker, however GetResponse throwing errors. I'm stuck please help.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Web;


namespace ProxyChecker
{



    internal class Program
    {

        private static void Main(string[] args)
        {
            string path = "C:\\users\\zsolt\\desktop\\proxies.txt";
            //string path = args[0];
            List<string> proxies = File.ReadLines(path).ToList();

            Parallel.ForEach(proxies, proxy =>
            {


                WebProxy myproxy = new WebProxy(proxy);
                WebRequest myWebRequest = WebRequest.Create("http://www.google.com");
                myWebRequest.Timeout = 3000;
                myWebRequest.Proxy = myproxy;
                WebResponse myWebResponse = myWebRequest.GetResponse();
                myWebResponse.Close();

                try
                {
                    using (WebResponse response = myWebRequest.GetResponse())
                    {
                        HttpWebResponse httpResponse = (HttpWebResponse) response;
                        Console.WriteLine(proxy, httpResponse.StatusCode);
                    }
                }
                catch
                    (WebException e)
                {
                    using (WebResponse response = e.Response)
                    {
                        HttpWebResponse httpResponse = (HttpWebResponse) response;
                        Console.WriteLine("Error code: {0}", httpResponse.StatusCode);
                        using (Stream data = response.GetResponseStream())
                        {
                            string text = new StreamReader(data).ReadToEnd();
                            Console.WriteLine(proxy, text);
                        }
                    }
                }

                });

                Console.Read();
            }
        }
  }