todoBusco.cs

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

namespace todoBusco
{
    class Program
    {
        static void Main(string[] args)
        {
            object locker = new object();
            string numero_galeano = "50585524261";
         
            List<string> urls = new List<string>() { };
            DirectoryInfo dir = new DirectoryInfo("./urls");
            FileInfo[] files = dir.GetFiles("*.txt");
            foreach(FileInfo file in files)
            {
                string[] _urls = File.ReadAllLines(file.FullName);
                foreach (string url in _urls) { 
                    if( url != "" )
                        urls.Add(url);
                }
            }

            string[] shuffleMe = urls.ToArray();
            var rng = new Random();
            rng.Shuffle(shuffleMe);
            List<string> urls_shu = shuffleMe.ToList<string>();

            int total = urls_shu.Count();
            int count = 0;

            // ENVIAR PETICION
            Parallel.ForEach(urls_shu, url => {
                using (WebClient wc = new WebClient())
                {
                    lock (locker)
                    {
                        count++;
                    }

                    string id_publicacion = url.Split('-').Last();
                    wc.Headers.Add("Cookie", File.ReadAllText("cookie.txt"));
                    wc.Headers.Add("x-requested-with", "XMLHttpRequest");
                    wc.Headers.Add("content-type", "application/x-www-form-urlencoded");
                    wc.Headers.Add("Referer", url);

                    string request = "txtIdAviso=" + id_publicacion + "&txtMessage=Hola.+Estoy+interesado+que+me+llamen+al+siguiente+n%C3%BAmero%3A+" + numero_galeano + "&txtUrlAviso=" + HttpUtility.UrlEncode(url) + "&txtNumber=" + numero_galeano;

                    try
                    {
                       string result = wc.UploadString("https://todobusco.com/ficha-aviso/callme", request);
                       Console.WriteLine("Solicitud hacia " + id_publicacion + " enviada " + count + " / " + total + " | Resultado: " + result);
                    }
                    catch (Exception ex) {
                        try {
                            string result = wc.UploadString("https://todobusco.com/ficha-aviso/callme", request);
                            Console.WriteLine("Solicitud hacia " + id_publicacion + " enviada " + count + " / " + total + " | Resultado: " + result);
                        } 
                        catch (Exception ex2) {
                            Console.WriteLine("ERROR consultando " + url);
                        }
                    }
                }
            });
        }
    }
    static class RandomExtensions
    {
        public static void Shuffle<T>(this Random rng, T[] array)
        {
            int n = array.Length;
            while (n > 1)
            {
                int k = rng.Next(n--);
                T temp = array[n];
                array[n] = array[k];
                array[k] = temp;
            }
        }
    }

}