public async override void ViewDidLoad()
        {
            base.ViewDidLoad();
            var           options = ApplicationOptions.Current;
            TcpTextWriter writer  = null;

            if (!string.IsNullOrEmpty(options.HostName))
            {
                try {
                    writer = new TcpTextWriter(options.HostName, options.HostPort);
                } catch (Exception ex) {
                    Console.WriteLine("Network error: Cannot connect to {0}:{1}: {2}. Continuing on console.", options.HostName, options.HostPort, ex);
                    writer = null;                     // will default to the console
                }
            }

            // we generate the logs in two different ways depending if the generate xml flag was
            // provided. If it was, we will write the xml file to the tcp writer if present, else
            // we will write the normal console output using the LogWriter
            var logger = (writer == null || options.EnableXml) ? new LogWriter() : new LogWriter(writer);

            logger.MinimumLogLevel = MinimumLogLevel.Info;
            var testAssemblies = GetTestAssemblies();
            var runner         = RegisterType.IsXUnit ? (Xamarin.iOS.UnitTests.TestRunner) new XUnitTestRunner(logger) : new NUnitTestRunner(logger);
            var categories     = await IgnoreFileParser.ParseTraitsContentFileAsync(NSBundle.MainBundle.BundlePath, RegisterType.IsXUnit);

            // add category filters if they have been added
            runner.SkipCategories(categories);

            // if we have ignore files, ignore those tests
            var skippedTests = await IgnoreFileParser.ParseContentFilesAsync(NSBundle.MainBundle.BundlePath);

            if (skippedTests.Any())
            {
                // ensure that we skip those tests that have been passed via the ignore files
                runner.SkipTests(skippedTests);
            }
            await runner.Run(testAssemblies).ConfigureAwait(false);

            Xamarin.iOS.UnitTests.TestRunner.Jargon jargon = Xamarin.iOS.UnitTests.TestRunner.Jargon.NUnitV3;
            switch (options.XmlVersion)
            {
            default:
            case XmlVersion.NUnitV2:
                jargon = Xamarin.iOS.UnitTests.TestRunner.Jargon.NUnitV2;
                break;

            case XmlVersion.NUnitV3:
                jargon = Xamarin.iOS.UnitTests.TestRunner.Jargon.NUnitV3;
                break;
            }
            if (options.EnableXml)
            {
                runner.WriteResultsToFile(writer ?? Console.Out, jargon);
                logger.Info("Xml file was written to the tcp listener.");
            }
            else
            {
                string resultsFilePath = runner.WriteResultsToFile(jargon);
                logger.Info($"Xml result can be found {resultsFilePath}");
            }

            logger.Info($"Tests run: {runner.TotalTests} Passed: {runner.PassedTests} Inconclusive: {runner.InconclusiveTests} Failed: {runner.FailedTests} Ignored: {runner.FilteredTests}");
            if (options.TerminateAfterExecution)
            {
                BeginInvokeOnMainThread(TerminateWithSuccess);
            }
        }
        void RunTests()
        {
            var        options = ApplicationOptions.Current;
            TextWriter writer  = null;

            if (!string.IsNullOrEmpty(options.HostName) && string.IsNullOrEmpty(options.LogFile))
            {
                http_writer = new HttpTextWriter()
                {
                    HostName = options.HostName.Split(',')[0], Port = options.HostPort
                };
                Console.WriteLine("Sending results to {0}:{1} using HTTP", http_writer.HostName, http_writer.Port);
                http_writer.Open();
                writer = http_writer;
            }
            else if (!string.IsNullOrEmpty(options.LogFile))
            {
                writer = new StreamWriter(options.LogFile);
            }

            // we generate the logs in two different ways depending if the generate xml flag was
            // provided. If it was, we will write the xml file to the tcp writer if present, else
            // we will write the normal console output using the LogWriter
            var logger = (writer == null || options.EnableXml) ? new LogWriter() : new LogWriter(writer);

            logger.MinimumLogLevel = MinimumLogLevel.Info;
            var testAssemblies = GetTestAssemblies();

            runner = RegisterType.IsXUnit ? (Xamarin.iOS.UnitTests.TestRunner) new XUnitTestRunner(logger) : new NUnitTestRunner(logger);
            var categories = IgnoreFileParser.ParseTraitsContentFile(NSBundle.MainBundle.BundlePath, RegisterType.IsXUnit);

            // add category filters if they have been added
            runner.SkipCategories(categories);

            // if we have ignore files, ignore those tests
            var skippedTests = IgnoreFileParser.ParseContentFiles(NSBundle.MainBundle.BundlePath);

            if (skippedTests.Any())
            {
                // ensure that we skip those tests that have been passed via the ignore files
                runner.SkipTests(skippedTests);
            }

            ThreadPool.QueueUserWorkItem((v) =>
            {
                BeginInvokeOnMainThread(async() =>
                {
                    lblStatus.SetText(string.Format("{0} tests", runner.TotalTests));
                    await runner.Run(testAssemblies).ConfigureAwait(false);
                    RenderResults();
                    cmdRun.SetEnabled(true);
                    cmdRun.SetHidden(false);
                    Xamarin.iOS.UnitTests.TestRunner.Jargon jargon = Xamarin.iOS.UnitTests.TestRunner.Jargon.NUnitV3;
                    switch (options.XmlVersion)
                    {
                    default:
                    case XmlVersion.NUnitV2:
                        jargon = Xamarin.iOS.UnitTests.TestRunner.Jargon.NUnitV2;
                        break;

                    case XmlVersion.NUnitV3:
                        jargon = Xamarin.iOS.UnitTests.TestRunner.Jargon.NUnitV3;
                        break;
                    }
                    if (options.EnableXml)
                    {
                        runner.WriteResultsToFile(writer, jargon);
                        logger.Info("Xml file was written to the http listener.");
                    }
                    else
                    {
                        string resultsFilePath = runner.WriteResultsToFile(jargon);
                        logger.Info($"Xml result can be found {resultsFilePath}");
                    }
                    logger.Info($"Tests run: {runner.TotalTests} Passed: {runner.PassedTests} Inconclusive: {runner.InconclusiveTests} Failed: {runner.FailedTests} Ignored: {runner.FilteredTests}");
                    if (options.TerminateAfterExecution)
                    {
                        var writer_finished_task = http_writer?.FinishedTask;
                        http_writer?.Close();
                        Task.Run(async() => {
                            if (writer_finished_task != null)
                            {
                                await writer_finished_task;
                            }
                            TerminateWithSuccess();
                        });
                    }
                });
            });
        }