What's the purpose of Session.Close()?

[maxifom]

I thought (without looking at the source code), that Session is separate from Connection, and that Session.Close() closes session and not the Connection.
Intutively I defer'ed Session.Close() and not wanted to close db connection.
Is there any particular reason for this, as we can call Session.Connection.Close()?

[taylorchu]

There is no need to close session. you only need to close connection. session is just a wrapper of connection with different loggers, which can be different per request/call.