Aegis.Network.AwaitableMethod.SendAndWaitResponse C# (CSharp) Method

        public virtual async Task<Packet> SendAndWaitResponse(Packet packet, ushort responsePacketId, int timeout)
        {
            TaskCompletionSource<Packet> tcs = new TaskCompletionSource<Packet>();
            CancellationTokenSource cancel = new CancellationTokenSource();
            TCSData data = new TCSData() { packetId = responsePacketId, tcs = tcs, predicate = null };
            Packet response = null;


            lock (_listTCS)
            {
                _listTCS.Add(data);
            }


            //  Task.Result의 Timeout 처리
            Task.Run(async () =>
            {
                try
                {
                    await Task.Delay(timeout, cancel.Token);
                    tcs.SetCanceled();
                }
                catch (Exception)
                {
                }
            });

            //  Packet Send & Response 작업
            await Task.Run(() =>
            {
                try
                {
                    _session.SendPacket(packet);
                    response = tcs.Task.Result;
                    cancel.Cancel();
                }
                catch (Exception)
                {
                    //  Task가 Cancel된 경우 추가된 작업(data)을 삭제한다.
                    _listTCS.Remove(data);
                }
            });

            cancel.Dispose();


            if (response == null)
                throw new WaitResponseTimeoutException("The waiting time of ResponsePacketId(0x{0:X}) has expired.", responsePacketId);


            return response;
        }