private async Task<bool?> IsBluetoothEnabled()
    {
        Windows.Networking.Proximity.PeerFinder.Start();
        try
        {
            var peers = await Windows.Networking.Proximity.PeerFinder.FindAllPeersAsync();
            return true;
        }
        catch (Exception ex)
        {
            if ((uint)ex.HResult == 0x8007048F)
            {
                return false;
            }

        }
        return null;
    }