Dynamo.PackageManager.PackageDownloadHandle.Error C# (CSharp) Méthode

        public void Error(string errorString)
        {
            this.DownloadState = State.Error;
            this.ErrorString = errorString;
        }

        internal void DownloadAndInstall(PackageDownloadHandle packageDownloadHandle)
        {
            var pkgDownload = new PackageDownload(packageDownloadHandle.Header._id, packageDownloadHandle.VersionName);

            Downloads.Add(packageDownloadHandle);

            ThreadStart start = () =>
            {
                try
                {
                    var response = Client.Execute(pkgDownload);
                    var pathDl   = PackageDownload.GetFileFromResponse(response);

                    dynSettings.Controller.UIDispatcher.BeginInvoke((Action)(() =>
                    {
                        try
                        {
                            packageDownloadHandle.Done(pathDl);

                            Package dynPkg;

                            var firstOrDefault = dynSettings.PackageLoader.LocalPackages.FirstOrDefault(pkg => pkg.Name == packageDownloadHandle.Name);
                            if (firstOrDefault != null)
                            {
                                firstOrDefault.UninstallCommand.Execute();
                            }

                            if (packageDownloadHandle.Extract(out dynPkg))
                            {
                                var downloadPkg = Package.FromDirectory(dynPkg.RootDirectory);
                                downloadPkg.Load();
                                dynSettings.PackageLoader.LocalPackages.Add(downloadPkg);
                                packageDownloadHandle.DownloadState = PackageDownloadHandle.State.Installed;
                            }
                        }
                        catch (Exception e)
                        {
                            packageDownloadHandle.Error(e.Message);
                        }
                    }));
                }
                catch (Exception e)
                {
                    packageDownloadHandle.Error(e.Message);
                }
            };

            new Thread(start).Start();
        }