One click Lgin for all the sites

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace baltracker
{
   public partial class Form1 : Form
   {
      string url = "http://www.filmai.in";
      string username = "login";
      string password = "pass";
      public Form1()
      {
         InitializeComponent();
         Login();
      }

private void Login()
{
	 WebBrowser b = new WebBrowser();
	 b.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(b_DocumentCompleted);
	 b.Navigate(url);
}

private void b_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
	 WebBrowser b = sender as WebBrowser;
	 b.DocumentCompleted -= new WebBrowserDocumentCompletedEventHandler(b_DocumentCompleted);
	 b.DocumentCompleted += new           WebBrowserDocumentCompletedEventHandler(b_DocumentCompleted2);

string postData = string.Format("login_name=0}&login_password=1}&image.x=0&image.y=0&login=submit", username, password);
	 ASCIIEncoding enc = new ASCIIEncoding();
    b.Navigate(url, "", enc.GetBytes(postData), "Content-Type: application/x-www-form-urlencoded\r\n");
}

private void b_DocumentCompleted2(object sender, WebBrowserDocumentCompletedEventArgs e)
{
	 WebBrowser b = sender as WebBrowser;
	 string response = b.DocumentText;
         MessageBox.Show("baigta");
}

private void Form1_Load(object sender, EventArgs e)
{

}
   }
}