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

The search is either closed by the server or has some errors and there are a few ways to fix it but it still doesn’t work
When I call using Packet Sender, it’s still normal
Debug has an error in stream.ReadAsync, the rest is normal
[enter image description here](https://i.sstatic.net/GkcrL0QE.png)

                // 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();

I tried with Packet Sender at the same time with that error and it worked without error, which means there is a problem with my code.
I added

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

but not successful