System.IO.BufferedStream.LastSyncCompletedReadTask C# (CSharp) Méthode

        private Task<int> LastSyncCompletedReadTask(int val)
        {

            Task<int> t = _lastSyncCompletedReadTask;
            Debug.Assert(t == null || t.Status == TaskStatus.RanToCompletion);

            if (t != null && t.Result == val)
                return t;

            t = Task.FromResult<int>(val);
            _lastSyncCompletedReadTask = t;
            return t;
        }