增加.Net应用程序中的最大帖子大小？

Question

我正在制作一个C＃控制台应用程序来加密和上传文件到Backblaze B2备份。我正在使用HttpWebRequest使用他们的API上传文件，但是，当我上传任何大于4MB的内容时，我会从"Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host."获得IOException stream.Write。我必须根据B2 API使用HTTP POST请求，那么有没有办法超过.Net的4MB限制？

我的相关代码是

internal void UploadFile(FileInfo f, string sha1) {
    HttpWebRequest webRequest = WebRequest.CreateHttp(this.uploadUrl);
    webRequest.Method = "POST";
    webRequest.Headers.Add("Authorization", this.uploadAuthorizationToken);
    webRequest.Headers.Add("X-Bz-File-Name", f.Name);
    webRequest.Headers.Add("X-Bz-Content-Sha1", sha1);
    webRequest.ContentType = "application/octet-stream";
    webRequest.ContentLength = f.Length;
    byte[] bytes = File.ReadAllBytes(f.FullName);
    using (var stream = webRequest.GetRequestStream()) {
        stream.Write(bytes, 0, bytes.Length); //IOException occurs here
        stream.Close();
    }
    WebResponse response = (HttpWebResponse)webRequest.GetResponse();
    var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
    response.Close();
    Console.WriteLine("b2_upload_file:\n" + responseString);

}

b2_upload_file https://www.backblaze.com/b2/docs/b2_upload_file.html

的文档