peterfoot

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;

namespace BluetoothDiagnostics
{
    public sealed class BluetoothComPort
    {

peterfoot

        var devices = DeviceInformation.FindAll(RfcommDeviceService.GetDeviceSelector(RfcommServiceId.SerialPort));
        var deviceInfo = devices[0]; // this makes some assumptions about your paired devices so really the results should be enumerated and checked for the correct device
        var device = BluetoothDevice.FromDeviceInformation(deviceInfo);
        var serResults = device.GetRfcommServices(BluetoothCacheMode.Cached);
        foreach(RfcommDeviceService serv in serResults.Services)
        {
            if(serv.ServiceId == RfcommServiceId.SerialPort)
            {
                var stream = serv.OpenStream();
                byte[] buff = System.Text.Encoding.ASCII.GetBytes("Testing\r\n");

peterfoot

namespace Microsoft.Toolkit.Mvvm.Messaging.Messages
{
    public sealed class NotificationMessage<T>
    {
        public NotificationMessage(T content, string notification)
        {
            Content = content;
            Notification = notification;
        }

peterfoot

using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Input;

namespace InTheHand.UI.Xaml.Controls
{
    public static class NavigationViewHelper
    {
        /// <summary>
        /// Add standard access keys to the NavigationView control.
        /// </summary>

peterfoot

public static bool TryGetCurrentActivity(out Activity activity)
        {
            activity = null;

#if NET6_0_OR_GREATER

            // check for Uno without taking a hard dependency
            var t = Type.GetType("Uno.UI.ContextHelper, Uno, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null", false, true);
            if (t != null)
            {