private void EnterFileName()
        {
            string fileName = FilePrefix.ToString().ToLowerInvariant();

            _emailApp.EnterSubject(fileName);
            _emailApp.EnterFileName(fileName);
        }
        /// <summary>
        /// Performs ScanToEmail job on Control Panel
        /// </summary>
        /// <param name="device"></param>
        /// <param name="emailScanData"></param>
        /// <returns></returns>
        private PluginExecutionResult ExecuteEmailActivity(IDevice device, ScanActivityData emailScanData, IAuthenticator authenticator)
        {
            var result = new PluginExecutionResult(PluginResult.Failed);

            // Make sure the device is in a good state
            UpdateStatus($"Setting up device at address {device.Address} for user {ExecutionData.Credential.UserName}");
            var devicePrepManager = DevicePreparationManagerFactory.Create(device);

            devicePrepManager.WorkflowLogger = WorkflowLogger;
            devicePrepManager.InitializeDevice(true);

            // Load the email application
            IEmailApp contentionEmailApp = EmailAppFactory.Create(device);

            //Launch the Scan to Email application
            UpdateStatus("ScanToEmail Activity: Launching the Scan To Email application...");
            contentionEmailApp.Launch(authenticator, AuthenticationMode.Lazy);

            //Enter subject and file name
            ScanFilePrefix FilePrefix = new ScanFilePrefix(ExecutionData.SessionId, ExecutionData.Credential.UserName, "Email");
            string         fileName   = FilePrefix.ToString().ToLowerInvariant();

            contentionEmailApp.EnterSubject(fileName);
            UpdateStatus("ScanToEmail Activity: Email subject entered...");
            contentionEmailApp.EnterFileName(fileName);
            UpdateStatus("ScanToEmail Activity: File name entered...");

            List <string> emailList = new List <string>();

            emailList.Add(emailScanData.EmailAddress);
            //Enter email address
            contentionEmailApp.EnterToAddress(emailList);
            UpdateStatus("ScanToEmail Activity: Email address entered...");

            try
            {
                ScanExecutionOptions options = new ScanExecutionOptions();
                options.ValidateJobExecution = false;
                if (emailScanData.PageCount > 1)
                {
                    options.JobBuildSegments = emailScanData.PageCount;
                }

                //Finish the job
                UpdateStatus("ScanToEmail Activity: Finishing the activity...");
                if (contentionEmailApp.ExecuteJob(options))
                {
                    result = new PluginExecutionResult(PluginResult.Passed);
                }

                // Clean up
                try
                {
                    devicePrepManager.NavigateHome();
                    if (devicePrepManager.SignOutRequired())
                    {
                        UpdateStatus("ScanToEmail Activity: Signing Out...");
                        devicePrepManager.SignOut();
                    }
                    UpdateStatus("ScanToEmail Activity: Activity finished");
                }
                catch (Exception ex) when(ex is DeviceCommunicationException || ex is DeviceInvalidOperationException)
                {
                    // Don't fail the activity if there is an exception here.
                    ExecutionServices.SystemTrace.LogWarn($"Device could not return to home screen: {ex.ToString()}");
                }
            }
            finally
            {
                // End of ScanToEmail activity
                ExecutionServices.SystemTrace.LogDebug("ScanToEmail activity completed");
            }

            return(result);
        }