If the first connection is successful, restart the program immediately and retrieve the device again, but the service will not be successful. Why?

[bbhxwl]

If the first connection is successful, quickly restart the program to obtain the device, which does not need to be connected. By default, it is already connected. In this case, use the [GetPrimaryServiceAsync] method. It will remain stuck here and cannot continue unless the software is restarted again,.