Hi folks, I'm trying to get a workflow to download a file and not having much luck - has anyone had success with this and could help?

Currently, I have a file attribute that allows the client to select a media item, I can open this and using SendFileAsync can see it start to download... but then when "return WorkflowExecutionStatus.Completed" gets called the request gets interupted and the file gets cancelled.

Here's what I believe is the offending portion of code:

var filepath = new FileInfo(filename);

var response = _httpContextAccessor.HttpContext?.Response;

response.Clear();
response.Headers.Add("Content-Disposition", "attachment;filename=" + filepath.Name);
response.Headers.Add("Content-Length", filepath.Length.ToString());
response.Headers.Add("Content-Transfer-Encoding", "binary");
new FileExtensionContentTypeProvider().Mappings.TryGetValue(filepath.Extension, out var contenttype);
response.ContentType = contenttype ?? "application/octet-stream";
response.SendFileAsync(filepath.FullName);
response.CompleteAsync();

return WorkflowExecutionStatus.Completed;

Any help would be greatly appreciated, thank you.