If ADO .Net supports disconnected architecture why do we have to close a
connection after we open it? Isn't ADO .Net supposed to do that automatically
since it supports the disconntected architecture?

Why is it that i don't have to open a connection (by writing e.g. Conn.Open)
after i establish a connection visually through the Server Explorer? Does the
establishing a connection through the Server Explorer automatically opens the
connection?
Any insights on these matters will be highly appreciated by this novice.