private async Task CreateHidService()

in BluetoothLEExplorer/BluetoothLEExplorer/Models/VirtualKeyboard.cs [169:229]
49 lines of code
7 McCabe index (conditional complexity)

        private async Task CreateHidService()
        {
            // HID service.
            var hidServiceProviderCreationResult = await GattServiceProvider.CreateAsync(GattServiceUuids.HumanInterfaceDevice);
            if (hidServiceProviderCreationResult.Error != BluetoothError.Success)
            {
                Debug.WriteLine("Failed to create the HID service provider: " + hidServiceProviderCreationResult.Error);
                throw new Exception("Failed to create the HID service provider: " + hidServiceProviderCreationResult.Error);
            }
            m_hidServiceProvider = hidServiceProviderCreationResult.ServiceProvider;
            m_hidService = m_hidServiceProvider.Service;

            // HID keyboard Report characteristic.
            var hidKeyboardReportCharacteristicCreationResult = await m_hidService.CreateCharacteristicAsync(GattCharacteristicUuids.Report, c_hidInputReportParameters);
            if (hidKeyboardReportCharacteristicCreationResult.Error != BluetoothError.Success)
            {
                Debug.WriteLine("Failed to create the keyboard report characteristic: " + hidKeyboardReportCharacteristicCreationResult.Error);
                throw new Exception("Failed to create the keyboard report characteristic: " + hidKeyboardReportCharacteristicCreationResult.Error);
            }
            m_hidKeyboardReport = hidKeyboardReportCharacteristicCreationResult.Characteristic;
            m_hidKeyboardReport.SubscribedClientsChanged += HidKeyboardReport_SubscribedClientsChanged;

            // HID keyboard Report Reference descriptor.
            var hidKeyboardReportReferenceCreationResult = await m_hidKeyboardReport.CreateDescriptorAsync(BluetoothUuidHelper.FromShortId(c_hidReportReferenceDescriptorShortUuid), c_hidKeyboardReportReferenceParameters);
            if (hidKeyboardReportReferenceCreationResult.Error != BluetoothError.Success)
            {
                Debug.WriteLine("Failed to create the keyboard report reference descriptor: " + hidKeyboardReportReferenceCreationResult.Error);
                throw new Exception("Failed to create the keyboard report reference descriptor: " + hidKeyboardReportReferenceCreationResult.Error);
            }
            m_hidKeyboardReportReference = hidKeyboardReportReferenceCreationResult.Descriptor;

            // HID Report Map characteristic.
            var hidReportMapCharacteristicCreationResult = await m_hidService.CreateCharacteristicAsync(GattCharacteristicUuids.ReportMap, c_hidReportMapParameters);
            if (hidReportMapCharacteristicCreationResult.Error != BluetoothError.Success)
            {
                Debug.WriteLine("Failed to create the HID report map characteristic: " + hidReportMapCharacteristicCreationResult.Error);
                throw new Exception("Failed to create the HID report map characteristic: " + hidReportMapCharacteristicCreationResult.Error);
            }
            m_hidReportMap = hidReportMapCharacteristicCreationResult.Characteristic;

            // HID Information characteristic.
            var hidInformationCharacteristicCreationResult = await m_hidService.CreateCharacteristicAsync(GattCharacteristicUuids.HidInformation, c_hidInformationParameters);
            if (hidInformationCharacteristicCreationResult.Error != BluetoothError.Success)
            {
                Debug.WriteLine("Failed to create the HID information characteristic: " + hidInformationCharacteristicCreationResult.Error);
                throw new Exception("Failed to create the HID information characteristic: " + hidInformationCharacteristicCreationResult.Error);
            }
            m_hidInformation = hidInformationCharacteristicCreationResult.Characteristic;

            // HID Control Point characteristic.
            var hidControlPointCharacteristicCreationResult = await m_hidService.CreateCharacteristicAsync(GattCharacteristicUuids.HidControlPoint, c_hidControlPointParameters);
            if (hidControlPointCharacteristicCreationResult.Error != BluetoothError.Success)
            {
                Debug.WriteLine("Failed to create the HID control point characteristic: " + hidControlPointCharacteristicCreationResult.Error);
                throw new Exception("Failed to create the HID control point characteristic: " + hidControlPointCharacteristicCreationResult.Error);
            }
            m_hidControlPoint = hidControlPointCharacteristicCreationResult.Characteristic;
            m_hidControlPoint.WriteRequested += HidControlPoint_WriteRequested;

            m_hidServiceProvider.AdvertisementStatusChanged += HidServiceProvider_AdvertisementStatusChanged;
        }