Network Visual C++ .NET

#include "stdafx.h"
using namespace System;
using namespace System::IO;
using namespace System::Net;
using namespace System::Net::Sockets;
void main()
{
    TcpClient^ server;
    StreamWriter^ writer;
    StreamReader^ reader; 
    String^ msg;
    server = gcnew TcpClient("127.0.0.1", 12345);
    writer = gcnew StreamWriter(server->GetStream()); 
    reader = gcnew StreamReader(server->GetStream()); 
    msg = "msg";
    writer->WriteLine(msg);
    writer->Flush();
    msg = reader->ReadLine();
    Console::WriteLine(msg);
    Console::WriteLine("Ended connection with server.");
    server->Close();
}