public class PacketListener
{
    private bool _isRunning;
    
    public PacketListener(ServerClient client)
    {
        _isRunning = true;

        NetworkStream stream = client.Stream;
        while (_isRunning)
        {
            byte[] buffer = new byte[1024];
            int bytesRead = stream.Read(buffer, 0, buffer.Length);

            if (bytesRead > 0)
            {
                stream.Write(buffer, 0, bytesRead);
            }
            else
            {
                break;
            }
        }
        
        client.Client.Close();
        Console.WriteLine("Client has disconnected.");
    }

    public void Stop()
    {
        _isRunning = false;
    }
}

public class PacketListener
{
    private bool _isRunning;
    
    public PacketListener(ServerClient client)
    {
        _isRunning = true;

        NetworkStream stream = client.Stream;
        while (_isRunning)
        {
            byte[] buffer = new byte[1024];
            int bytesRead = stream.Read(buffer, 0, buffer.Length);

            if (bytesRead > 0)
            {
                stream.Write(buffer, 0, bytesRead);
            }
            else
            {
                break;
            }
        }
        
        client.Client.Close();
        Console.WriteLine("Client has disconnected.");
    }

    public void Stop()
    {
        _isRunning = false;
    }
}

public class ServerConnection
{
    private static bool _IsRunning;
    
    private readonly TcpListener _listener;
    
    public ServerConnection(IPAddress address, int port)
    {
        if (_IsRunning)
        {
            throw new Exception("Server is already running.");
        }
        
        _listener = new TcpListener(address, port);
        _IsRunning = true;
    }

    public void Init()
    {
        try
        {
            _listener.Start();
            Console.WriteLine("Server started. Waiting for connections...");
            
            TcpClient client = _listener.AcceptTcpClient();
            Console.WriteLine("Client connected.");

            new ServerClient(client);
        }
        catch (Exception e)
        {
            Console.WriteLine("Server Error: " + e.Message);
        }
    }
}

public class ServerConnection
{
    private static bool _IsRunning;
    
    private readonly TcpListener _listener;
    
    public ServerConnection(IPAddress address, int port)
    {
        if (_IsRunning)
        {
            throw new Exception("Server is already running.");
        }
        
        _listener = new TcpListener(address, port);
        _IsRunning = true;
    }

    public void Init()
    {
        try
        {
            _listener.Start();
            Console.WriteLine("Server started. Waiting for connections...");
            
            TcpClient client = _listener.AcceptTcpClient();
            Console.WriteLine("Client connected.");

            new ServerClient(client);
        }
        catch (Exception e)
        {
            Console.WriteLine("Server Error: " + e.Message);
        }
    }
}

Stream.Write(packetBytes, 0, packetBytes.Length);  

Stream.Write(packetBytes, 0, packetBytes.Length);