GcFinalizersEventListener.cs

sealed class GcFinalizersEventListener : EventListener
{
    // from https://docs.microsoft.com/en-us/dotnet/framework/performance/garbage-collection-etw-events
    private const int GC_KEYWORD =                 0x0000001;
    private const int TYPE_KEYWORD =               0x0080000;
    private const int GCHEAPANDTYPENAMES_KEYWORD = 0x1000000;

    protected override void OnEventSourceCreated(EventSource eventSource)
    {
        Console.WriteLine($"{eventSource.Guid} | {eventSource.Name}");

        // look for .NET Garbage Collection events
        if (eventSource.Name.Equals("Microsoft-Windows-DotNETRuntime"))
        {
            EnableEvents(
                eventSource, 
                EventLevel.Verbose, 
                (EventKeywords) (GC_KEYWORD | GCHEAPANDTYPENAMES_KEYWORD | TYPE_KEYWORD)
                );
        }
    }

    // from https://blogs.msdn.microsoft.com/dotnet/2018/12/04/announcing-net-core-2-2/
    // Called whenever an event is written.
    protected override void OnEventWritten(EventWrittenEventArgs eventData)
    {
        ...
    }
}

class Program
{
    static void Main(string[] args)
    {
        GcFinalizersEventListener listener = new GcFinalizersEventListener();

        Console.WriteLine("\nPress ENTER to trigger a few finalizers...");
        Console.ReadLine();
        for (int i = 0; i < 4; i++)
        {
            Thread t = new Thread(()=> {});
        }
        GC.Collect(2, GCCollectionMode.Forced, true, true);

        Console.WriteLine("\nPress ENTER to exit...");
        Console.ReadLine();
    }
}