IronPigeon.Relay.Controllers.InboxController.WaitIncomingMessageAsync C# (CSharp) Method

        private static Task WaitIncomingMessageAsync(string id)
        {
            TaskCompletionSource<object> tcs;
            lock (LongPollWaiters)
            {
                if (!LongPollWaiters.TryGetValue(id, out tcs))
                {
                    LongPollWaiters[id] = tcs = new TaskCompletionSource<object>();
                }
            }

            return tcs.Task;
        }