When are C# “using” statements most useful?

Question

So a using statement automatically calls the dispose method on the object that is being \"used\", when the using block is exited, right?

But when is this necessary/benef

Answer 1

Without using (or manually calling Dispose()), the object will eventually be disposed of, just not at a deterministic time. That is, it can happen straight away, in two days' time, or (in some cases) never.

For things like, say, network connections, you want the connection to close when you're done with it, not "whenever", otherwise it'll idle around hogging up a socket.

Further, for things like mutex locks, you do not want those to be released "whenever", or else deadlock is likely to result.