If An airline is "countable", this means that there MUST be a flight attendant present on the plane, whose sole job is to count: , so if you're doing complicated work to evaluate the enumerable bey you read from it, that work doesn't happen until it's asked for. This is https://cobjectkullanm30617.worldblogged.com/33847850/c-ienumerable-nedir-Üzerinde-buzz-söylenti