c# - Enable multiple BLE Characteristic notifications in UWP -

i have tried enable 2 notification in uwp application, every time first characteristic notify user.

    accessconfigurationcharacteristic();                 configurationselectedcharacteristic = selectedcharacteristic;                 characteristicnotifyenableforconfig();                  await task.delay(5000);                  accessdiagnosticcharacteristic();                 diagnosticselectedcharacteristic = selectedcharacteristic;                 characteristicnotifyenable();    private async void characteristicnotifyenable()         {             try             {                 // bt_code: must write cccd in order server send notifications.                 // receive them in valuechanged event handler.                 // note sample configures either indicate or notify, not both.                 var result = await                         diagnosticselectedcharacteristic.writeclientcharacteristicconfigurationdescriptorasync(                             gattclientcharacteristicconfigurationdescriptorvalue.notify);                 if (result == gattcommunicationstatus.success)                 {                     addvaluechangedhandler();                     // rootpage.notifyuser("successfully registered notifications", notifytype.statusmessage);                 }                 else                 {                      //  rootpage.notifyuser($"error registering notifications: {result}", notifytype.errormessage);                 }             }             catch (unauthorizedaccessexception ex)             {                 // happens when device reports support notify, doesn't.               //  rootpage.notifyuser(ex.message, notifytype.errormessage);             }         } 

'characteristicnotifyenableforconfig()' method similar characteristicnotifyenable() different characterstic.can me solve.