当通过REST上传文件到OneDrive时，得到一个400 Bad Request错误

我试图使用REST将文件上传到OneDrive，但当我尝试这样做时，我看到了400个坏请求错误。这是我的代码:

//Where I call it
//fileLoc being C:''path''test.doc
HttpUploadFile("https://apis.live.net/v5.0/folder.xxxxxxxx/files/" + "?" + access_token, @fileLoc, "file", "application/octet-stream");
public static void HttpUploadFile(string url, string file, string paramName, string contentType)
        {
            log4net.ILog log = log4net.LogManager.GetLogger(typeof(Program));
            log.Debug(string.Format("Uploading {0} to {1}", file, url));
            string boundary = "A300x";// "---------------------------" + DateTime.Now.Ticks.ToString("x");
            byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("'r'n--" + boundary + "'r'n");
        HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
        wr.ContentType = "multipart/form-data; boundary=" + boundary;
        wr.Method = "POST";
        wr.KeepAlive = true;
        wr.Credentials = System.Net.CredentialCache.DefaultCredentials;
        Stream rs = wr.GetRequestStream();
        rs.Write(boundarybytes, 0, boundarybytes.Length);
        string headerTemplate = "Content-Disposition: form-data; name='"{0}'"; filename='"{1}'"'r'nContent-Type: {2}'r'n'r'n";
        string header = string.Format(headerTemplate, paramName, "TEMPTEST.docx", contentType);
        byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
        rs.Write(headerbytes, 0, headerbytes.Length);
        FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
        byte[] buffer = new byte[4096];
        int bytesRead = 0;
        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
        {
            rs.Write(buffer, 0, bytesRead);
        }
        fileStream.Close();
        byte[] trailer = System.Text.Encoding.ASCII.GetBytes("'r'n--" + boundary + "--'r'n");
        rs.Write(trailer, 0, trailer.Length);
        rs.Close();
        WebResponse wresp = null;
        try
        {
            wresp = wr.GetResponse();
            Stream stream2 = wresp.GetResponseStream();
            StreamReader reader2 = new StreamReader(stream2);
            log.Debug(string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd()));
            MessageBox.Show("Success!");
        }
        catch (Exception ex)
        {
            log.Error("Error uploading file", ex);
            if (wresp != null)
            {
                wresp.Close();
                wresp = null;
            }
            MessageBox.Show("There was an error!" + Environment.NewLine + ex.Message);
        }
        finally
        {
            wr = null;
        }
    }

有谁知道我的问题是什么吗?我最初没有将我的范围设置为能够写作，但已经纠正了这一点，因此这不是问题。

Content-Disposition: Attachment; filename=example.html