wyDay.Controls.AutomaticUpdaterBackend.updateHelper_ProgressChanged C# (CSharp) Method

        void updateHelper_ProgressChanged(object sender, UpdateHelperData e)
        {
            switch (e.ResponseType)
            {
                case Response.Failed:

                    // show the error icon & menu
                    // and set last successful step
                    UpdateStepFailed(UpdateStepToUpdateStepOn(e.UpdateStep), new FailArgs { ErrorTitle = e.ExtraData[0], ErrorMessage = e.ExtraData[1] });

                    break;
                case Response.Succeeded:

                    switch (e.UpdateStep)
                    {
                        case UpdateStep.CheckForUpdate:

                            AutoUpdaterInfo.LastCheckedForUpdate = DateTime.Now;

                            // there's an update available
                            if (e.ExtraData.Count != 0)
                            {
                                version = e.ExtraData[0];

                                // if there are changes, save them
                                if (e.ExtraData.Count > 1)
                                {
                                    changes = e.ExtraData[1];
                                    changesAreRTF = e.ExtraDataIsRTF[1];
                                }

                                // save the changes to the AutoUpdateInfo file
                                AutoUpdaterInfo.UpdateVersion = version;
                                AutoUpdaterInfo.ChangesInLatestVersion = changes;
                                AutoUpdaterInfo.ChangesIsRTF = changesAreRTF;
                            }
                            else
                            {
                                // Clear saved version details for cases where we're
                                // continuing an update (the version details filled
                                // in from the AutoUpdaterInfo file) however,
                                // wyUpdate reports your app has since been updated.
                                // Thus we need to clear the saved info.
                                version = null;
                                changes = null;
                                changesAreRTF = false;

                                AutoUpdaterInfo.ClearSuccessError();
                            }

                            break;
                        case UpdateStep.DownloadUpdate:

                            UpdateStepOn = UpdateStepOn.UpdateDownloaded;

                            break;
                        case UpdateStep.RestartInfo:

                            // show client & send the "begin update" message
                            updateHelper.InstallNow();

                            // close this application so it can be updated
                            // use either the custom handler or Environment.Exit();
                            if (CloseAppNow != null)
                                CloseAppNow(this, EventArgs.Empty);
                            else
                                Environment.Exit(0);

                            return;
                    }

                    StartNextStep(e.UpdateStep);

                    break;
                case Response.Progress:

                    // call the progress changed event
                    if (ProgressChanged != null)
                        ProgressChanged(this, e.Progress);

                    break;
            }
        }