WorkerBase.cs:

        protected virtual void Dispose(bool alsoManaged)
        {
            StopAsync().Wait();

            lock (SyncLock)
            {
            ...
                try { OnDisposing(); } catch { /* Ignore */ }
            ...
        }

        public Task<WorkerState> PauseAsync()
        {
            lock (SyncLock)
            {
            ...
        }


CommandManager.cs:

        protected override void OnDisposing()
        {
            ...
            // wait for any pending direct commands (unlikely)
            this.LogDebug(Aspects.EngineCommand, "Dispose is waiting for pending direct commands.");
            while (IsDirectCommandPending)
                Task.Delay(Constants.DefaultTimingPeriod).Wait();
            ...
        }


CommandManager.Direct.cs:

        private Task<bool> ExecuteDirectCommand(DirectCommandType command, Func<bool> commandDeleagte)
        {
            ...
                    PauseAsync().Wait();
            ...
        }