Prüfen, ob mein Personalausweis da ist...

PersonalausweisAbholen.cs

using System;
using System.Collections.Generic;
using System.Net.Http;

namespace CardStatus
{
    class Program
    {
        static void RunCheck(int antragsnummer)
        {
            // Create client
            var client = new HttpClient();

            // Create HTML form data
            var content = new FormUrlEncodedContent(new Dictionary<string, string> 
            {
                { "COMMAND", "CHECK" },
                { "Nr", antragsnummer.ToString() }
            });

            // Submit request and get response asynchronously
            var response = client.PostAsync("http://duesseldorf.dokument-abholen.de/index.php", content);

            // Check whether we got an OK response
            if (response.Result.IsSuccessStatusCode)
            {
                // Read response data asynchronously
                var result = response.Result.Content.ReadAsStringAsync();
                if (result.Result.Contains("leider noch nicht"))
                {
                    Console.WriteLine("Grmpf... Leider noch nicht da");
                }
                else
                {
                    Console.WriteLine("Yippie ... Perso holen gehen...");
                }
            }
            else
            {
                Console.WriteLine("Could not download data");
            }
        }

        static void Main(string[] args)
        {
            RunCheck(12345);

            Console.ReadLine();
        }
    }
}

/*
POST http://duesseldorf.dokument-abholen.de/index.php HTTP/1.1
Host: duesseldorf.dokument-abholen.de
Referer: http://duesseldorf.dokument-abholen.de/
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Content-Length: 27

COMMAND=CHECK&Nr=3449024354
 */