SignalRProgressBar

// Show progress bar
                var currentUserName = "DOMAIN\\XXX";
                var jobName = "xxxx"; 

                PushMessageEmitter.ProgressBarNotifyStart(currentUserName, jobName);

                // Submit webservice call and spawn task to blindly update progress bar simultaneously
                CancellationTokenSource cts = new CancellationTokenSource();

                var result2 = await new [] {
                        Task.Run<bool>(async () =>
                        {
                            for (int i = 1; i < 10; i++)
                            {
                                await Task.Delay(TimeSpan.FromSeconds(1), cts.Token);
                                PushMessageEmitter.ProgressBarNotifyProgress(currentUserName, jobName, i * 10);
                            }
                            
                            return false;
                        }, cts.Token),
                        Task.Run<bool>(async () =>
                        {
                            await Task.Delay(TimeSpan.FromSeconds(8), cts.Token);

                            return true;
                        }, cts.Token)
                    }
                    .Select(t => t.ToObservable())
                    .Merge()
                    .FirstOrDefaultAsync(success => success);

                PushMessageEmitter.ProgressBarNotifyProgress(currentUserName, jobName, 100);
                PushMessageEmitter.ProgressBarNotifyEnd(currentUserName, jobName);

                cts.Cancel();