System.IO.FileStream.AsyncCopyToAwaitable.UnsafeOnCompleted C# (CSharp) Méthode

            public void UnsafeOnCompleted(Action continuation)
            {
                if (_continuation == s_sentinel ||
                    Interlocked.CompareExchange(ref _continuation, continuation, null) != null)
                {
                    Debug.Assert(_continuation == s_sentinel, $"Expected continuation set to s_sentinel, got ${_continuation}");
                    Task.Run(continuation);
                }
            }
        }