About connecting serial devices

[GreenShadeZhang]

I use Winrt's serial api in the latest version 1.1.1 of the Windows App SDK, the code is as follows.

         // Target all Serial Devices present on the system
            var deviceSelector = SerialDevice.GetDeviceSelector();

            var myDevices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(deviceSelector);

            deviceWatcher = DeviceInformation.CreateWatcher(deviceSelector);

            deviceWatcher.Added += new TypedEventHandler<DeviceWatcher, DeviceInformation>(this.OnDeviceAdded);
            deviceWatcher.Removed += new TypedEventHandler<DeviceWatcher, DeviceInformationUpdate>(this.OnDeviceRemoved);

I also applied for permission at Package.appxmanifest.

The corresponding event cannot be triggered when I unplug and plug in the serial device.