http header info has been added into attachment content

[liaoyalien]

I use 3.0.0-beta-298 version to upload a blank text file as attachment to Zendesk.
It's was successfully uploaded. But when I open the file on Zendesk . I found the content was added additional digits as below pic.
It seems the http header has been added to the content.

I use the code this way....
foreach (IFormFile file in files)
{
Upload upload = await client.Attachments.UploadAsync(file.FileName, file.OpenReadStream());
if (upload != null)
{
AttachToken.Add(upload.Token);
}
}

[Jetski5822]

Most weird, it seems like the issue is to do with the way the form encodes the data... I think the problem is this line

ZendeskApiClient/src/ZendeskApi.Client/Extensions/HttpRequestExtensions.cs

Line 57 in 6c30035

using (var content = new MultipartFormDataContent()) // hmm

Have you managed to find a work around?

[liaoyalien]

Thank you to point this out. I'm not sure if below solution will work.
https://stackoverflow.com/questions/10339877/asp-net-webapi-how-to-perform-a-multipart-post-with-file-upload-using-webapi-ht

[liaoyalien]

Hello~~ I found the root cause. replace line 57 to 63 to below.
It should be StreamContent rather than MultipartFormDataContent

using (var content = new StreamContent(inputStream)) { content.Headers.ContentType = new MediaTypeHeaderValue("application/binary"); return await client.PostAsync(requestUri, content).ConfigureAwait(false); }