asp.net HttpWebRequest生产问题

Question

我有以下代码将数据PUT到api：

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(ConfigUtil.ApiEndPoint);
req.ContentType = "application/json";
req.Headers.Add(ConfigUtil.GetUserAdminApiHeader());
req.Method = "PUT";
UTF8Encoding encoding = new UTF8Encoding();
byte[] data = encoding.GetBytes(jsonData);
req.ContentLength = data.Length;

using (System.IO.Stream newStream = req.GetRequestStream())
{
    newStream.Write(data, 0, data.Length);

    WebResponse response = req.GetResponse();
    status =response!=null? ((HttpWebResponse)response).StatusCode:HttpStatusCode.InternalServerError;

}

当我在本地运行时，它运行完美，但是当我在生产中运行相同的应用程序时，我收到错误

  

'System.Net.ProtocolViolationException'{“您必须编写ContentLength   调用[Begin] GetResponse之前到请求流的字节。“}

如上面的代码所示，我将contentlength字节写入请求流。为什么这会在生产中失败（Windows 2012 R2）而不是在本地？