I really need some help please.
It seems a .NET framework class HttpPostedFileBase is leaked out into the swagger docs. This class no longer even exists in .NETCore.
I am trying to figure out how to call this API with MultipartFormDataContent but always get a 400 response with no useful information 
var multiPartContent = new MultipartFormDataContent();
multiPartContent.Add(new StringContent(JsonConvert.SerializeObject(createAttachment, _settings.Value)));
multiPartContent.Add(new ByteArrayContent(createAttachment.Content), "file", createAttachment.FileName);
request_.Content = multiPartContent;
Does anyone have any examples of using this endpoint?