C# 每个请求都是一次完整的ssl握手，如何重用ssl会话？

.NET Framework 4.x

我有一个带有c#的HTTP客户端，我发现

HTTPS

请求总是完全握手。但是如果使用Postman请求，它将逐个会话重用SSL会话

这些是通过wireshark捕获的数据包：

client hello
      Extension:session_ticket(len=0)
sever hello
      Extension:session_ticket(len=0)
New Session Ticket
      Handshake Protocol: New Session Ticket
    Handshake Type: New Session Ticket (4)
    Length: 214
    TLS Session Ticket
        Session Ticket Lifetime Hint: 100800 seconds (1 day, 4 hours)
        Session Ticket Length: 208
        Session Ticket: 50bb2ffffb6ba4e17cdb6d4c6239f8decd2d590d97b01db4…

每个请求包都与上面相同

如果使用邮递员请求

client hello
          Extension:session_ticket(len=208)

有人知道吗

这是我的HTTP客户端

ServicePointManager.ServerCertificateValidationCallback = validationCallback;
if (strUrl.StartsWith("https"))
{
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;// | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls | SecurityProtocolType.Ssl3;
}

HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(strUrl);
httpWebRequest.CachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.CacheIfAvailable);
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/octet-stream";
httpWebRequest.Timeout = 30000; ///10s
httpWebRequest.ReadWriteTimeout = 30000; ///10s
httpWebRequest.KeepAlive = false;
httpWebRequest.ContentLength = bytes.Length;
httpWebRequest.Headers.Add("CustomKey", ident.ToString());
httpWebRequest.BeginGetRequestStream(new AsyncCallback(WriteCallback), new RequestState(httpWebRequest, bytes));