private void OnReceived(object sender, SocketAsyncEventArgs eventArgs)
        {
            while (true)
            {
                if (UdpHelper.IsHarmfulError(eventArgs.SocketError))
                {
                    return;
                }

                _receiveHandler(eventArgs.Buffer, eventArgs.BytesTransferred);
                lock (_socket) {
                    if (_disposed)
                    {
                        return;
                    }
                    else if (_socket.ReceiveAsync(eventArgs))
                    {
                        break;
                    }
                }
            }
        }
        private void OnReceived(object sender, SocketAsyncEventArgs eventArgs)
        {
            while (true)
            {
                if (UdpHelper.IsHarmfulError(eventArgs.SocketError))
                {
                    return;
                }

                _receiveHandler(eventArgs.RemoteEndPoint, eventArgs.Buffer, eventArgs.BytesTransferred);
                lock (_socket) {
                    if (_disposed)
                    {
                        return;
                    }
                    eventArgs.RemoteEndPoint = new IPEndPoint(IPAddress.IPv6Any, _port);
                    if (_socket.ReceiveFromAsync(eventArgs))
                    {
                        break;
                    }
                }
            }
        }