How to send data from C# to python using sockets?

I cannot find any example or a tutorial on how to send data from C# to python.

in my application, C# is supposed to keep reading data from a hardware and send it to python to be processed. i have tried to create a basic server on python and a basic client on C# and i was never able to establish connection between the client and the server with the following output from C# No connection could be made because the target machine actively refused it. i tested my python server on a python client and i was able to establish connection just fine.

how do i send data from C# to python correctly using sockets? is there any available tutorial on example i can follow? is there something wrong with my code? here it is:

Python Server code:

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((socket.gethostname(), 1234))
s.listen(5)

while True:
    clientsocket, address = s.accept()
    print(f"Connection from {address} has been established!")
    clientsocket.send(bytes("Welcome to the server!", "utf-8"))
    clientsocket.close()

C# Client Code:

 static void ExecuteClient()
        {

            try
            {

                IPHostEntry ipHost = Dns.GetHostEntry(Dns.GetHostName());
                IPAddress ipAddr = ipHost.AddressList[0];
                IPEndPoint localEndPoint = new IPEndPoint(ipAddr, 1234);

                Socket sender = new Socket(ipAddr.AddressFamily,
                           SocketType.Stream, ProtocolType.Tcp);

                try
                {
                    sender.Connect(localEndPoint);

                    Console.WriteLine("Socket connected to -> {0} ",
                                  sender.RemoteEndPoint.ToString());

                    byte[] messageReceived = new byte[1024];

                    int byteRecv = sender.Receive(messageReceived);
                    Console.WriteLine("Message from Server -> {0}",
                          Encoding.ASCII.GetString(messageReceived, 0, byteRecv));

                    sender.Shutdown(SocketShutdown.Both);
                    sender.Close();
                }

                // Manage of Socket's Exceptions 
                catch (ArgumentNullException ane)
                {

                    Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
                }

                catch (SocketException se)
                {

                    Console.WriteLine("SocketException : {0}", se.ToString());
                }

                catch (Exception e)
                {
                    Console.WriteLine("Unexpected exception : {0}", e.ToString());
                }
            }

            catch (Exception e)
            {

                Console.WriteLine(e.ToString());
            }
        }