C# Download Manager Projekt

        private void button1_Click(object sender, EventArgs e)
        {
            liveries foobar = checkedListBox1.SelectedItem as liveries;

            if (label1.Text == "Die Verbindung zum Server wurde hergestellt")
            {
                string link = foobar.m_link;
                string name = @"downloads\" + foobar.m_liveryname + ".exe";
                webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
                webClient.DownloadFileAsync(new Uri(link),name);
            }

            else
            {
                MessageBox.Show("Die Verbindung zum Server konnte nicht hergestellt werden! Bitte Prüfen sie ihre Internetverbindung");
            }
        }

class liveries
    {
        public string m_liveryname;
        public string m_link;


        public liveries()
        { }
        public override string ToString()
        {
            return this.m_liveryname;
        }

        public void Load(string reader)
        {
            string[] werte = reader.Split('|');
            m_liveryname = werte[0];
            m_link = werte[1];
        }

        public string EMaiL
        {
            get { return m_link; }
        }
    }

checkedListBox1.Items.Clear();
                    List<liveries> list = new List<liveries>();
                    StreamReader reader = new StreamReader(@"source\liveries.txt");

                    while (reader.EndOfStream == false)
                    {
                        liveries fooBar = new liveries();
                        fooBar.Load(reader.ReadLine());
                        list.Add(fooBar);

                    }
                    reader.Close();
                    checkedListBox1.Items.AddRange(list.ToArray());

                    foreach (liveries liver in checkedListBox1.CheckedItems)
                    {
                        string link = liver.m_link;
                        string name = @"downloads\" + liver.m_liveryname + ".exe";
                        webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
                        webClient.DownloadFile(new Uri(link), name);
                        progressBar1.Minimum = 0;
                    }

        private Queue<liveries> filesToDownload = new Queue<liveries>();

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            foreach (liveries liver in checkedListBox1.CheckedItems)
            {
                filesToDownload.Enqueue(liver); // Fügt Objekt in die Queue ein
            }

            DownloadNextFileFromQueue();
        }


        private void DownloadNextFileFromQueue()
        {
            if (filesToDownload.Any())
            {
                WebClient webClient = new WebClient();
                webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(webClient_DownloadFileCompleted);

                var liver = filesToDownload.Dequeue(); // Liest objekt aus der queue aus und löscht es
                string link = liver.m_link;
                string name = @"downloads\" + liver.m_liveryname + ".exe";

                webClient.DownloadFileAsync(new Uri(link), name);
            }
            else
            {
                   // Alle Dateien aus der queue wurden geladen
            }
        }

        void webClient_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            DownloadNextFileFromQueue();

            // update status oder so?!
        }

void webClient_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
DownloadNextFileFromQueue();
webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
}

WebClient webClient = new WebClient();                
webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(webClient_DownloadFileCompleted
webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);

private void button1_Click(object sender, RoutedEventArgs e)        {

webClient = new WebClient();
webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(webClient_DownloadFileCompleted);
webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);

....
}

            string pfad = @"downloads\";
            checkedListBox2.Items.Clear();
            System.IO.FileInfo[] fi = new System.IO.DirectoryInfo(pfad).GetFiles();
            foreach (var fileInfo in fi)
            {
                checkedListBox2.Items.Add(fileInfo.Name);
            }