HSocket

Create socket hub and set port and event and start server

        SocketHub server = new SocketHub(8953);
        Console.WriteLine("Server start on 8953");

        server.onHandshake += Server_onHandshake;
        server.OnConnected += Server_OnConnected;

        server.OnBinaryReceived += Server_OnBinaryReceived;
        server.OnTextReceived += Server_OnTextReceived;
        

        server.OnStateChange += Server_OnStateChange;
        server.OnClose += Server_OnClose;

        server.Start();

Or if u want more setting create you custum hub and connection with inheritance

class CustomConnection : Connection<CustomConnection>
{
      //login and any custom data
}
class CustomServer : SocketServer<CustomConnection>
{ 
    protected override void onMessageReceived(CustomConnection client, string message)
    {
        
    }
}

this library NOT USE win api socket and can work with old OS version