public class WatchMySmee : BackgroundService
{
    private readonly ILogger<WatchMySmee> _logger;

    public WatchMySmee(ILogger<WatchMySmee> logger) {
        _logger = logger;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken) {
        _logger.LogWarning("Start my smee");
        var smeeCli = new SmeeClient(new Uri("https://smee.io/bbD7RyIMjQ2LCV9"));

        smeeCli.OnConnect += (sender, args) => _logger.LogInformation("Connected to SMEE.io");
        smeeCli.OnMessage += (sender, smeeEvent) => {
            _logger.LogInformation($"Message: {JsonConvert.SerializeObject(smeeEvent)}")
        };
        //////////////////////////////////////////
        // See Console application for other events
        //////////////////////////////////////////
        await smeeCli.StartAsync(stoppingToken); // Token is optional here
    }
    
    // etc.
}

var smeeUri = new Uri("https://smee.io/bbD7RyIMjQ2LCV9"); // Random URI
var smeeCli = new SmeeClient(smeeUri);

// Register to the existing events, you should pick only what you require.
smeeCli.OnConnect += (sender, a) => Console.WriteLine($"Connected to Smee.io ({smeeUri})");
smeeCli.OnDisconnect += (sender, a) => Console.WriteLine($"Disconnected from Smee.io ({smeeUri})");
smeeCli.OnMessage += (sender, smeeEvent) =>
{
    Console.Write("Message received: ");
    Console.ForegroundColor = ConsoleColor.DarkYellow;
    Console.Write(JsonConvert.SerializeObject(smeeEvent)); // This is a typed object.
    Console.ResetColor();
    Console.WriteLine();
};
smeeCli.OnPing += (sender, a) => Console.WriteLine("Ping from Smee");
smeeCli.OnError += (sender, e) => Console.WriteLine("Error was raised (Disconnect/Anything else: " + e.Message);

// Ctrl-c from a main/console will be caught to cancel the event.
Console.CancelKeyPress += (sender, eventArgs) =>
    {
        source.Cancel();
        eventArgs.Cancel = true;
    };

await smeeCli.StartAsync(token); // Token is optional here