TCP通信报错：无法读取传输连接数据，远程主机强制关闭连接

错误提示 #

Unable to read data to the transport connection: An existing connection was forcibly closed by the remote host

问题描述 #

连接被远程服务器强制关闭，尝试多种修复手段均无效，但用Packet Sender调用时一切正常。调试确认错误出在stream.ReadAsync方法，其余代码逻辑无异常。

相关代码 #

// call TCP 
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

byte[] ByteASCII_1 = Encoding.ASCII.GetBytes(AsciiPayload);

TcpClient tcpClient = new TcpClient();

await tcpClient.ConnectAsync(ZgwIP, TCP_DIAG_PORT);

NetworkStream stream = tcpClient.GetStream();

await stream.WriteAsync(ByteASCII_1, 0, ByteASCII_1.Length);

byte[] buffer = new byte[1048];
int countByte = 0;

string stringHex = string.Empty;
while (stream.CanRead)
{
    int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
    if (bytesRead <= 0)
    {
        break;
    }
    //string hexResponse = CryptoHelper.ByteArrayToHexString(buffer, bytesRead);
    //stringHex += hexResponse;
    //countByte += bytesRead;
    //if (countByte >= 74)
    //{
    //    break;
    //}
}
RTB_Logs.AppendText($"\n{stringHex}\n");
tcpClient.Close();
stream.Close();

已添加以下安全协议设置代码，但问题仍未解决：

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

恳请帮忙排查代码中的问题。

内容的提问来源于stack exchange，提问作者Quang Ngô Văn