.net framework 4.0未能创建 SSL/TLS 安全通道_(securityprotocoltype)3072 不起效果

我是测试环境的正常的，上生产之后出现的问题
主要就是这部分：
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | (SecurityProtocolType)3072;

 public static string HttpPost(string url, string data, string auth)
        {
            HttpWebResponse wr = null;
            string _resContent = "";
            try 
            {
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | (SecurityProtocolType)3072;// | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls13 | SecurityProtocolType.SystemDefault;

                var request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.ContentType = "application/json;charset=UTF-8";
                request.Headers.Add("Authorization", auth);

                byte[] byteData = Encoding.UTF8.GetBytes(data);
                int length = byteData.Length;
                request.ContentLength = length;
                Stream writer = request.GetRequestStream();
                writer.Write(byteData, 0, length);
                writer.Close();
                wr = (HttpWebResponse)request.GetResponse();
                _resContent = new StreamReader(wr.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();
                wr.Close();
            } catch (Exception exp) 
            {
                LogHelper.Info("httpPost接口::" + exp.Message);
            }
            return _resContent.ToString();
        }
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完美解决！
原文链接：.net framework 4.0未能创建 SSL/TLS 安全通道