Parser Intellecta

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
using VkNet;
using VkNet.Enums.Filters;
using VkNet.Model.RequestParams;
namespace Lksh
{
    class Program
    {
        static WebClient client = new WebClient();
        static VkApi api = new VkApi();

        static string DownloadPage()
        {
            client.Encoding = System.Text.Encoding.UTF8;
            return (new StreamReader(client.OpenRead("http://intellect.lokos.net/sessions/letters.php"),System.Text.Encoding.GetEncoding("windows-1251"))).ReadToEnd();
        }
        static long SendMessage(string message)
        {
            return api.Messages.Send(new MessagesSendParams
            {
                PeerId = 2000000000 + 17,
                Domain = "https2130706433",
                Message = message,

            });

        }
        static void Main(string[] args)
        {

            string login = "+79533647653";
            string password = "Awotxuivamaneparol";

            api.Authorize(new ApiAuthParams
            {
                ApplicationId = 5461330,
                Login = login,
                Password = password,
                Settings = Settings.All

            });
            long id = api.UserId.Value;
            string prev;
            try
            {
                var baf = new StreamReader(@"C:\IntellectParser\buffer.txt");
                prev = baf.ReadToEnd();
                baf.Close();

            }
            catch (FileNotFoundException e)
            {
                prev = DownloadPage();
                Console.WriteLine("Файл буффера не найден! Он будет создан");
                System.IO.File.WriteAllText(@"C:\IntellectParser\buffer.txt", "");
            }
            catch (DirectoryNotFoundException e)
            {
                prev = DownloadPage();
                Console.WriteLine("Директория не найдена!");
                Directory.CreateDirectory(@"c:\IntellectParser");
                System.IO.File.WriteAllText(@"C:\IntellectParser\buffer.txt", "");
            }
            while (true)
            {
                string now = DownloadPage();
                if (now.Length != prev.Length)
                {
                    Console.WriteLine("Изменения на сайте Интеллекта");
                    SendMessage("Какие-то изменения на сайте Интеллекта");
                    prev = now;
                    System.IO.File.WriteAllText(@"C:\IntellectParser\buffer.txt", now);
                }
                System.Threading.Thread.Sleep(900000);
            }

        }
    }
}