I have the following method:

    public void PutFile(string ID, Stream content)
    {
        try
        {
            ThreadPool.QueueUserWorkItem(o => putFileWorker(ID, content));
        }

        catch (Exception ex)
        {
            OnPutFileError(this, new ExceptionEventArgs { Exception = ex });
        }
    }

The putFileWorker method looks like this:

    private void putFileWorker(string ID, Stream content)
    {
        //Get bucket name:
        var bucketName = getBucketName(ID)
            .ToLower();

        //get file key
        var fileKey = getFileKey(ID);

        try
        {
            //if the bucket doesn't exist, create it
            if (!Amazon.S3.Util.AmazonS3Util.DoesS3BucketExist(bucketName, s3client))
                s3client.PutBucket(new PutBucketRequest { BucketName = bucketName, BucketRegion = S3Region.EU });

            PutObjectRequest request = new PutObjectRequest();
            request.WithBucketName(bucketName)
                .WithKey(fileKey)
                .WithInputStream(content);

            S3Response response = s3client.PutObject(request);
            var xx = response.Headers;

            OnPutFileCompleted(this, new ValueEventArgs { Value = ID });
        }

        catch (Exception e)
        {
            OnPutFileError(this, new ExceptionEventArgs { Exception = e });
        }
    }

I've created a little console app to test this. I wire up event handlers for the OnPutFileError and OnPutFileCompleted events.

If I call my PutFile method, and step into this, it gets to the "//if the bucket doesn't exist, create it" line, then exits. No exception, no errors, nothing. It doesn't complete (i've set breakpoints on my event handlers too) - it just exits.

If I run the same method without the ThreadPool.QueueUserWorkItem then it runs fine...

Am I missing something?