c# - dll not working properly

Question

Didn't know which title to set, because I don't exactly know what is the problem. I had a working c# code, i wrapped it into dll to separate client from other functions, but now it doesn't work like intended. It is a client-server over udp . Here is my code:

HandlerFactory factory = new HandlerFactory();
        factory.RegisterHandler(RequestType.Options, () => new OptionsHandler());
        factory.RegisterHandler(RequestType.Unauthorized, () => new UnauthorizedHandler());
        factory.RegisterHandler(RequestType.Ok, () => new OkHandler());
        factory.RegisterHandler(RequestType.Invite, () => new InviteHandler());
        factory.RegisterHandler(RequestType.Bye, () => new ByeHandler());
        factory.RegisterHandler(RequestType.Error, () => new ErrorHandler());

        Application.SetCompatibleTextRenderingDefault(false);


        Client client = new Client(factory);
        client.Start();
        client.Register();

And in client:

    private void Listen()
    {
        while (!_stopping)
        {
            try
            {
                var asyncResult = MyUdpClient.BeginReceive(HandleIncomingUdpRequest, null);
                WaitHandle.WaitAny(new[] { _stopHandle, asyncResult.AsyncWaitHandle });
            }
            catch (Exception ex)
            {
                using (var sw = new StreamWriter("log.txt"))
                {
                    sw.WriteLine("Date:" + DateTime.Now + "\r\nError:" + ex.Message + "\r\n");
                }
            }
        }
        MyUdpClient.Close();
    }

private void HandleIncomingUdpRequest(IAsyncResult ar)
        {
            var received = MyUdpClient.EndReceive(ar, ref _serverAddress);
            var requestString = Encoding.ASCII.GetString(received);
            var type = Helper.GetRequestType(requestString);
            if (type != RequestType.Trying && type != RequestType.Unknown)
            {
                ProcessRequest(type, requestString);
            }
        }

So, i wrapped it into dll, and now use it like this:

        var factory = new Factory.HandlerFactory();
        factory.RegisterHandler(RequestType.Options, ()=> new OptionsHandler());
        factory.RegisterHandler(RequestType.Unauthorized, () => new UnauthorizedHandler());
        factory.RegisterHandler(RequestType.Ok, () => new OkHandler());
        factory.RegisterHandler(RequestType.Invite, () => new InviteHandler());
        factory.RegisterHandler(RequestType.Bye, () => new ByeHandler());
        factory.RegisterHandler(RequestType.Error, () => new ErrorHandler());
        Client cl = new Client(factory);
        cl.Start();
        cl.Register();
        cl.Call("2");

The problem is, on cl.Call("2") i get "An unhandled exception of type 'System.ObjectDisposedException' occurred in System.dll" in

                var received = MyUdpClient.EndReceive(ar, ref _serverAddress);

And in Register(), client should send Register Request, get response that he is not Unauthorized and call UnauthorizedHandler, but this is not happening.

Answer 1

仅从指定的行和您的描述开始，我将检查ref _serverAddress是否正确初始化，因为它似乎是全局变量，该变量很可能是在主应用程序中初始化的，但是您已将用法移到了dll中。

Answer 2

The problem was - I don't know how it happened - in this code:

private void Listen()
    {
        while (!_stopping)
        {
            try
            {
                var asyncResult = MyUdpClient.BeginReceive(HandleIncomingUdpRequest, null);
                WaitHandle.WaitAny(new[] { _stopHandle, asyncResult.AsyncWaitHandle });
            }
            catch (Exception ex)
            {
                using (var sw = new StreamWriter("log.txt"))
                {
                    sw.WriteLine("Date:" + DateTime.Now + "\r\nError:" + ex.Message + "\r\n");
                }
            }
            MyUdpClient.Close();
        }
    }

MyUdpClient.Close() was called inside the loop. I must have changed try-catch blocks and accidentally put that inside the loop, and when I asked this question i copypasted it from different source.