OverlappedAsyncBaseResult does not make processed bytes available.

[mateli]

When using OverlappedAsyncBase for read and write operation, getting the number of written/read bytes is very useful.

I am thinking something like this: asyncResult.Complete(true, (int)code); >> asyncResult.Complete(true, (int)code, bytes);

internal void Complete(bool synch = false, int error = 0, uint bytes = 0)
{
    CompletedSynchronously = synch;
    errorCode = error;
        processedBytes = bytes;
    if (IsCompleted) return;
        IsCompleted = true;
        lock (lockObj)
        {
            evt?.Set();
            AsyncCallback?.Invoke(this);
        }
    }
}

[dahall]

Added to 4.0.0 beta