Program.cs

using System;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

namespace SharpBrick.PoweredUp.Examples;

class Program
{
    // invoke (due to multi-targeting) with ...
    // dotnet run -f net5.0 --
    // dotnet run -f net5.0-windows10.0.19041.0 --

    // use command line parameters
    // --EnableTrace true
    // --BluetoothAdapter WinRT|BlueGigaBLE
    // --COMPortName COM4
    // --TraceDebug true
    // or configure in poweredup.json
    static async Task Main(string[] args)
    {
        // (1) load a configuration
        var configuration = new ConfigurationBuilder()
            .SetBasePath(Environment.CurrentDirectory)
            .AddJsonFile("poweredup.json", true)
            .AddCommandLine(args)
            .Build();

        // Example Selection: select the example to execute
        var exampleToExecute = configuration["Example"] ?? "Colors";

        var typeToExecute = Assembly
            .GetExecutingAssembly()
            .GetTypes()
            .FirstOrDefault(x => x.FullName.StartsWith($"Example.Example{exampleToExecute}"));

        if (typeToExecute is null)
        {
            Console.WriteLine("Could not find example.");

            return;
        }

        var example = Activator.CreateInstance(typeToExecute) as Example.BaseExample;


        // (2) build the DI container
        var serviceCollection = new ServiceCollection();

        // (2a) configure your favourite level of logging.
        serviceCollection.AddLogging(builder =>
        {
            builder
                .AddConsole();

            if (bool.TryParse(configuration["EnableTrace"], out var enableTrace) && enableTrace)
            {
                builder.AddFilter("SharpBrick.PoweredUp.Bluetooth.BluetoothKernel", LogLevel.Debug);
            }
            if (bool.TryParse(configuration["TraceDebug"], out var traceDebug) && traceDebug)
            {
                builder.AddFilter("SharpBrick.PoweredUp.BlueGigaBLE.BlueGigaBLEPoweredUpBluetoothAdapater", LogLevel.Debug);
            }
        });

        // (2b) add .AddPoweredUp() (we delegate this into the example because some examples need a different setup)
        example.Configure(serviceCollection);


        // (2c) add your favourite Bluetooth Adapter
        var bluetoothAdapter = configuration["BluetoothAdapter"] ?? "WinRT";

#if WINDOWS
        if (bluetoothAdapter == "WinRT")
        {
            serviceCollection.AddWinRTBluetooth();
        }
#endif

#if NET5_0_OR_GREATER
        if (bluetoothAdapter == "BlueGigaBLE")
        {
            // config for "COMPortName" and "TraceDebug" (either via command line or poweredup.json)
            // on Windows-PCs you can find it under Device Manager --> Ports (COM & LPT) --> Bleugiga Bluetooth Low Energy (COM#) (where # is a number)
            // "COMPortName": "COM4",

            // setting this option to false supresses the complete LogDebug()-commands; so they will not generated at all
            // "TraceDebug": true
            serviceCollection.AddBlueGigaBLEBluetooth(configuration);
        }
#endif

        var serviceProvider = serviceCollection.BuildServiceProvider();

        // Examples Initialization
        await example.InitExampleAndDiscoverAsync(serviceProvider, configuration);

        // Example Execution
        if (example.SelectedHub is not null)
        {
            await example.ExecuteAsync();
        }
    }
}