void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
            this.Invoke((MethodInvoker) delegate
            {
                if (e.Error == null || e.Error.Message != "Der Remotename konnte nicht aufgelöst werden: 'ausbildungsbericht.net'")
                {
                    try
                    {
                        UpdateConfig config = UpdateConfig.Deserialize(e.Result);

                        lblNewVersionShortcut.Text = "Neuste Version: " + config.Version;
                        Version OnlineVersion      = Version.Parse(config.Version);
                        Version LocalVersion       = Version.Parse(Application.ProductVersion);
                        if (OnlineVersion == LocalVersion)
                        {
                            lblNewVersionShortcut.ForeColor   = Color.LightGreen;
                            lblLocalVersionShortCut.ForeColor = Color.LightGreen;
                        }
                        else
                        {
                            lblNewVersionShortcut.ForeColor = Color.Red;
                        }
                        if (OnlineVersion > LocalVersion)
                        {
                            btnUpdate.Enabled = true;
                        }
                        if (_settings["AutoUpdate"] == "1" && OnlineVersion > LocalVersion)
                        {
                            frmUpdateMessage um = new frmUpdateMessage();
                            um.ShowDialog();
                        }
                    }
                    catch
                    {
                        lblNewVersionShortcut.Text = "Neuste Version: N/A";
                    }
                }
                else
                {
                    lblNewVersionShortcut.Text = "Neuste Version: N/A";
                }
            });
        }
        private void btnUpdate_Click(object sender, EventArgs e)
        {
            frmUpdateMessage um = new frmUpdateMessage();

            um.ShowDialog();
        }