public bool CalcRating(out long r)
{
if ((Subscribers != null) && (Documents != null))
{
long rr = Subscribers.Count();
Documents.ForEach(d => {
long dr = 0;
if (d.CalcRating(out dr))
{
d.Rating = dr;
}
rr += d.Rating; });
r = rr;
return true;
}
r = 0;
return false;
}