C#自动更新程序

好吧，我正在开发一个程序，如果版本不匹配，它会自动下载更新。现在的问题是，它从XML文件加载信息，但没有下载指定的文件。

欢迎任何改进代码的建议！

以下是完整的源代码：

http://www.mediafire.com/?44d9mcuhde9fv3e

http://www.virustotal.com/file-scan/report.html?id=178ab584fd87fd84b6fd77f872d9fd08795f5e3957aa8fe7eee03e1fa9440e74-1309401561

提前感谢您的帮助！

编辑在Program.cs中指定的要下载的文件没有下载，程序在上卡住

currentFile = string.Empty;
                label1.Text = "Preparing to download file(s)...";
                Thread t = new Thread(new ThreadStart(DownloadFiles)); // Making a new thread because I prefer downloading 1 file at a time
                t.Start();

并启动"线程t"。

出现问题的代码：

UpdateForm.cs

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.Net.NetworkInformation;
using System.Net;
using System.IO;
using System.Threading;
using System.Diagnostics;
using System.Xml;
using System.Xml.Linq;
using System.Runtime.InteropServices;
namespace LauncherBeta1
{
    public partial class UpdateForm : Form
    {
        const int MF_BYPOSITION = 0x400;
        [DllImport("User32")]
        private static extern int RemoveMenu(IntPtr hMenu, int nPosition, int wFlags);
        [DllImport("User32")]
        private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
        [DllImport("User32")]
        private static extern int GetMenuItemCount(IntPtr hWnd);

        private static WebClient webClient = new WebClient();
        internal static List<Uri> uriFiles = new List<Uri>();
        internal static Uri uriChangelog = null;
        private static long fileSize = 0, fileBytesDownloaded = 0;
        private static Stopwatch fileDownloadElapsed = new Stopwatch();
        bool updateComplete = false, fileComplete = false;
        string currentFile = string.Empty, labelText = string.Empty;
        int progbarValue = 0, KBps = 0;
        public UpdateForm()
        {
            IntPtr hMenu = GetSystemMenu(this.Handle, false);
            int menuItemCount = GetMenuItemCount(hMenu);
            RemoveMenu(hMenu, menuItemCount - 1, MF_BYPOSITION);
            InitializeComponent();
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load("http://raiderz.daregamer.com/updates/app_version.xml");
            XmlNode xNodeVer = xdoc.DocumentElement.SelectSingleNode("Version");
            FileVersionInfo fileVer = FileVersionInfo.GetVersionInfo(AppDomain.CurrentDomain.BaseDirectory + "lua5.1.dll");
            int ver_app = Convert.ToInt32(fileVer.FileVersion.ToString());
            int ver_xml = Convert.ToInt32(xNodeVer);
            if (ver_xml == ver_app)
            {
                Application.Run(new Form1());
                Environment.Exit(0);
            }
            else
            {
                if (ver_xml < ver_app || ver_xml > ver_app)
                {
                    if (uriChangelog != null)
                    {
                        label1.Text = "Status: Downloading changelog...";
                        try
                        {
                            string log = webClient.DownloadString(uriChangelog);
                            log = log.Replace("'n", Environment.NewLine);
                            txtboxChangelog.Text = log;
                        }
                        catch (WebException ex) { }
                    }
                    foreach (Uri uri in uriFiles)
                    {
                        string uriPath = uri.OriginalString;
                        currentFile = uriPath.Substring(uriPath.LastIndexOf('/') + 1);
                        if (File.Exists(currentFile))
                        {
                            label1.Text = "Status: Deleting " + currentFile;
                            File.Delete(currentFile);
                        }
                    }
                    currentFile = string.Empty;
                    label1.Text = "Preparing to download file(s)...";
                    Thread t = new Thread(new ThreadStart(DownloadFiles)); // Making a new thread because I prefer downloading 1 file at a time
                    t.Start();
                }
                else
                {
                    //MessageBox.Show("Client is up to date!");
                    Application.Run(new Form1());
                    Environment.Exit(0);
                }
            }
        }
        private void DownloadFiles()
        {
            foreach (Uri uri in uriFiles)
            {
                try
                {
                    fileComplete = false;
                    fileDownloadElapsed.Reset();
                    fileDownloadElapsed.Start();
                    string uriPath = uri.OriginalString;
                    currentFile = uriPath.Substring(uriPath.LastIndexOf('/') + 1);
                    webClient.DownloadFileAsync(uri, currentFile);
                    webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(DownloadFileCompleted);
                    webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressChanged);
                    while (!fileComplete) { Thread.Sleep(1000); }
                }
                catch { continue; }
            }
            currentFile = string.Empty;
            updateComplete = true;
        }
        void DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            progbarValue = e.ProgressPercentage;
            fileSize = e.TotalBytesToReceive / 1024;
            fileBytesDownloaded = e.BytesReceived / 1024;
            if (fileBytesDownloaded > 0 && fileDownloadElapsed.ElapsedMilliseconds > 1000)
            {
                KBps = (int)(fileBytesDownloaded / (fileDownloadElapsed.ElapsedMilliseconds / 1000));
            }
            labelText = "Status: Downloading " + currentFile +
                        "'n" + fileBytesDownloaded + " KB / " + fileSize + " KB - " + KBps + " KB/s";
        }
        void DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            progbarValue = 0;
            fileComplete = true;
        }
        /// <summary>
        /// Returns file size (Kb) of a Uri
        /// </summary>
        /// <param name="uri"></param>
        /// <returns></returns>
        private long GetFileSize(Uri uri)
        {
            try
            {
                WebRequest webRequest = HttpWebRequest.Create(uri);
                using (WebResponse response = webRequest.GetResponse())
                {
                    long size = response.ContentLength;
                    return size / 1024;
                }
            }
            catch { return 1; }
        }
        private void timerMultiPurpose_Tick(object sender, EventArgs e)
        {
            if (updateComplete == true)
            {
                updateComplete = false;
                label1.Text = "Status: Complete";
                progressBar1.Value = 0;
                MessageBox.Show("Update complete!!");
                Application.Run(new Form1());
                Environment.Exit(0);
            }
            else
            {
                progressBar1.Value = progbarValue;
                label1.Text = labelText;
            }
        }
        private void UI_FormClosing(object sender, FormClosingEventArgs e)
        {
            Environment.Exit(0);
        }
    }
}

Program.cs:中的相关代码

    System.Threading.Thread.Sleep(1000); // Give the calling application time to exit
    XmlDocument xdoc = new XmlDocument();
    xdoc.Load("http://raiderz.daregamer.com/updates/app_version.xml");
    XmlNode xNodeVer = xdoc.DocumentElement.SelectSingleNode("Loc");
    string ver_xml = Convert.ToString(xNodeVer);

        args = new string[2];
        args[0] = "Changelog=http://raiderz.daregamer.com/updates/changelog.txt";
        args[1] = "URIs=" + ver_xml;
        if (args.Length == 0)
        {
            MessageBox.Show("Can not run program without parameters", "Error");
            return;
        }
        try
        {
            foreach (string arg in args)
            {
                if (arg.StartsWith("URIs="))
                {
                    string[] uris = arg.Substring(arg.IndexOf('=') + 1).Split(';');
                    foreach (string uri in uris)
                    {
                        if (uri.Length > 0)
                        {
                            UpdateForm.uriFiles.Add(new Uri(uri));
                        }
                    }
                }
                else if (arg.StartsWith("Changelog="))
                {
                    UpdateForm.uriChangelog = new Uri(arg.Substring(arg.IndexOf('=') + 1));
                }
            }
        }
        catch { MessageBox.Show("Missing or faulty parameter(s)", "Error"); }