public async Task Connect()

in BluetoothLEExplorer/BluetoothLEExplorer/Models/ObservableBluetoothLEDevice.cs [566:635]
55 lines of code
5 McCabe index (conditional complexity)

        public async Task<bool> Connect()
        {
            bool ret = false;
            string debugMsg = String.Format("Connect: ");

            Debug.WriteLine(debugMsg + "Entering");

            await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunTaskAsync(async () =>
            {
                Debug.WriteLine(debugMsg + "In UI thread");
                try
                {
                    Dispose();
                    Debug.WriteLine(debugMsg + "Calling BluetoothLEDevice.FromIdAsync");
                    BluetoothLEDevice = await BluetoothLEDevice.FromIdAsync(DeviceInfo.Id);

                    if (bluetoothLEDevice == null)
                    {
                        ret = false;
                        Debug.WriteLine(debugMsg + "BluetoothLEDevice is null");

                        MessageDialog dialog = new MessageDialog("No permission to access device", "Connection error");
                        await dialog.ShowAsync();
                    }
                    else
                    {
                        Debug.WriteLine(debugMsg + "BluetoothLEDevice is " + BluetoothLEDevice.Name);

                        // Setup our event handlers and view model properties
                        BluetoothLEDevice.ConnectionStatusChanged += BluetoothLEDevice_ConnectionStatusChanged;
                        BluetoothLEDevice.NameChanged += BluetoothLEDevice_NameChanged;
                        GattServicesChangedInstances = 0;
                        BluetoothLEDevice.GattServicesChanged += BluetoothLEDevice_GattServicesChanged;

                        IsPaired = DeviceInfo.Pairing.IsPaired;
                        CanPair = DeviceInfo.Pairing.CanPair;
                        IsConnected = BluetoothLEDevice.ConnectionStatus == BluetoothConnectionStatus.Connected;
                        Name = BluetoothLEDevice.Name;

                        UpdateSecureConnectionStatus();

                        BluetoothCacheMode cacheMode =  BluetoothLEExplorer.Services.SettingsServices.SettingsService.Instance.UseCaching ? BluetoothCacheMode.Cached : BluetoothCacheMode.Uncached;

                        ret = await GetAllPrimaryServices(cacheMode);
                    }
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(debugMsg + "Exception - " + ex.Message);
                    string msg = String.Format("Message:\n{0}\n\nInnerException:\n{1}\n\nStack:\n{2}", ex.Message, ex.InnerException, ex.StackTrace);

                    var messageDialog = new MessageDialog(msg, "Exception");
                    await messageDialog.ShowAsync();

                    // Debugger break here so we can catch unknown exceptions
                    Debugger.Break();
                }
            });

            if (ret)
            {
                Debug.WriteLine(debugMsg + "Exiting (0)");
            }
            else
            {
                Debug.WriteLine(debugMsg + "Exiting (-1)");
            }

            return ret;
        }