C# Post Login Tutorial For MPGH (For WebScraping)

using System.Security.Cryptography;
using System.Net;
using System****;

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;
using System.Security.Cryptography;
using System.Net;
using System****;

namespace WindowsFormsApplication1

public Boolean Login(String Username, String Password)
{

}

 Password = MD5(Password); //This is actually another Custom Method, so for now please do not worry about this as It will be later explained
            Boolean Value = false; //The Boolean we are returning
            String Data = "vb_login_username=" + Username + "&vb_login_password=&s=&do=login&vb_login_md5password=" + Password + "&vb_login_md5password_utf=" + Password; //This is for all vBulletins, as this is a coding tutorial I will not explain this.

try
            {
                HttpWebRequest Request = (HttpWebRequest)WebRequest.Create("http://www.mpgh.net/forum/login.php?do=login"); //Creates a httpwebrequest to post to the login.php
                Request.Method = WebRequestMethods.Http.Post; //using Post Method to php script
                Request.ContentType = "application/x-www-form-urlencoded"; //Vbulletin method (Gotten from Research)
                Request.UserAgent = "-- vBulletin Vaidation  --"; /Vbulletin Validation (Gotten from Research)

                Request.ContentLength = Data.Length; //Gets the Post Request length to the same as the data we are posting.

                StreamWriter rStream = new StreamWriter(Request.GetRequestStream()); //Write Data to the stream
                rStream.Write(Data);
                rStream.Flush(); 
                rStream.Close();

                HttpWebResponse Response = (HttpWebResponse)Request.GetResponse(); //After writing data to the stream get the response

                StreamReader resReader = new StreamReader(Response.GetResponseStream()); //Convert to response to string

                String str = resReader.ReadToEnd(); //Read contents of the whole string (Which is the same if you view source of php script

                if (str.Contains("Thank you")) //Read whole string to see if Thank You was processed, as thats what it says when you log in
                {
                    Value = true; //Set the Returned Boolean to true,
                    MessageBox.Show("LOGIN!!"); //Prove that you were logged in
                }
                else
                {
                    Value = false; //Return Boolean to False
                    MessageBox.Show("FAIL!!"); //Prove that incorrect emails.
                }

                Response.Close(); //Close the Response
            }
            catch (Exception ex) //If there is an error, display what was wrong with a message box named MPGH Login.
            {
                MessageBox.Show(ex.Message, "ERROR MPGH LOGIN!!");
            }

            return Value;

        public String MD5(String Pass)
        {
            ASCIIEncoding ASCIIenc = new ASCIIEncoding(); //Create new ASCIIEncoding
            String strReturn = String.Empty; //Create New String
            Byte[] ByteSourceText = ASCIIenc.GetBytes(Pass); //Create New Byte Array that contains the Bytes of the passed password
            MD5CryptoServiceProvider Md5Hash = new MD5CryptoServiceProvider(); //Create a new MD5 Hash Encryption
            Byte[] ByteHash = Md5Hash.ComputeHash(ByteSourceText); //Create another Byte Array which contains Encrypted Bytes of the Passed password

            foreach(Byte b in ByteHash){ //Get every byte in the Encrypted Array.
                strReturn += b.ToString("x2"); //Add it all to the string with the following method
            }



            return strReturn; //return the Md5 encrypted password for the login process
        }

        private void btnLogin_Click(object sender, EventArgs e) //btn is clicked
        {
            Login(Username.Text, Password.Text); //Pass the Contents of the login boxes Username and Password to the custom Method
        }