What bar does Bars.ClosePrices.Last(0) return in OnBarClosed()?

In the docs it says that

“When accessed in this event handler, the Bars collection does not contain the current live bar, whereas other collections (e.g., Positions, Symbols, etc.) contain actual data.”

Does this mean that

Bars.ClosePrices.Last(0)

inside the OnBarClosed() event handler returns the previous bar's close price (whereas Last(0) would typically return the current one)?