C# StreamReader auslesen von Textdateien

        private void Form1_Load(object sender, EventArgs e)
        {
            IsConnectionAvailable();

            if (label1.Text == "Die Verbindung zum Server wurde hergestellt")
            {
                webClient.DownloadFileAsync(new Uri("http://www.XXX/news.txt"), @"c:\news.txt");
                if (File.Exists(@"c:\news.txt"))
                {
                    StreamReader reader = new StreamReader(@"c:\news.txt", Encoding.Default);
                    string news = "";
                    news = reader.ReadToEnd();
                    label3.Text = news;
                }

                else
                {
                    MessageBox.Show("Es können keine News angezeigt werden!");
                }


            }

            else

            {
                label3.Text = "Es können keine News angezeigt werden!";
            }
        }

        private void GetNews()
        {
            WebClient webClient = new WebClient();
            webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClient_DownloadStringCompleted);
            webClient.DownloadStringAsync(new Uri("http://www.XXX/news.txt"));
        }

        void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
            if (e.Error == null)
            {
                label3.Text = e.Result;
            }
        }