1st post webclient, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Net;
using System.Collections.Specialized;
using System.IO;
using System.Text;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello, world!");
            string url = "http://app.1gb.ru";

using (var webClient = new WebClient())
            {
                // Создаём коллекцию параметров
                var pars = new NameValueCollection();

// Добавляем необходимые параметры в виде пар ключ, значение
                pars.Add("password", "qweQWE22");

// Посылаем параметры на сервер
                // Может быть ответ в виде массива байт
                //var response = webClient.UploadValues(url, pars); 
                byte[] r = webClient.UploadValues(url, pars);
 
                Console.WriteLine("\nResponse received was :{0}", Encoding.UTF8.GetString(r));
            }
            
        }

}
}

Show compiler warnings [ + ] Show input
Compilation time: 0,16 sec, absolute running time: 3,78 sec, cpu time: 0,56 sec, average memory usage: 28 Mb, average nr of threads: 11