Basic/Simple Updater

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


namespace Updater
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

      

        private void Form1_Load(object sender, EventArgs e)
            
        {

            try
            {
                timer1.Start();
                //======================================


                HttpWebRequest Requestzz = (HttpWebRequest)WebRequest.Create("https://dl.dropbo*****m/u/78998523/name.txt"); //Creates a httpwebrequest to post to the login.php




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

                StreamReader resReaderzz = new StreamReader(Responsezz.GetResponseStream()); //Convert to response to string

                String strzz = resReaderzz.ReadLine();



                //======================================


                //=======================================
                StreamReader sr = new StreamReader("version.txt");


                HttpWebRequest Request = (HttpWebRequest)WebRequest.Create("https://dl.dropbo*****m/u/78998523/latestversion.txt"); //Creates a httpwebrequest to post to the login.php




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

                //=========================================

                HttpWebRequest Requestz = (HttpWebRequest)WebRequest.Create("https://dl.dropbo*****m/u/78998523/url.txt"); //Creates a httpwebrequest to post to the login.php




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

                StreamReader resReaderz = new StreamReader(Responsez.GetResponseStream()); //Convert to response to string

                String strz = resReaderz.ReadLine();
                //=======================================
                String latest = str;
                int latestz = int.Parse(latest);   //latest version
                int latestversion = latestz;

                string number = sr.ReadLine();
                int currentversion = int.Parse(number); //current version

                //======================================
                if (currentversion < latestversion) // if current version is < (down) than latest version
                {
                    sr.Close();
                    resReader.Close();
                    WebClient wc = new WebClient();
                    wc.DownloadFileAsync(new Uri(strz), strzz); //download the file 
                    //strz = URL
                    //strzz = File Name


                    wc.DownloadProgressChanged += (s, x) => progressBar1.Value = x.ProgressPercentage; // show progress in progressbar in percentage
                    wc.DownloadProgressChanged += (s, x) => label1.Text = "%" + x.ProgressPercentage.ToString(); //show progress in percentage in label1

                    StreamWriter sw = new StreamWriter("version.txt");


                    sw.WriteLine(latestversion); //write latest version to version.txt
                    sw.Close(); //close streamReader

                }
                else
                {
                    MessageBox.Show("No Updates are Currently available"); //show the message that you already have the latest version
                    this.Close(); //close form
                }

            }
            catch (Exception ex) //If there is an error, display what was wrong with a message box 
            {
                MessageBox.Show(ex.Message, "Error : Updater");
                this.Close();
                
            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (label1.Text == "%100")
            {

                this.Close();
            }
        }
    }
}