I am maintaing a windows form application using WCF and are using net.tcp internally. The lifecycle of our connections is GET/USE/CLOSE.

We are having a problem with the application pool crashing with no trace. In looking at netstat, I can see when I come into the application as we have a login service. However, even though we are creating the proxy in a using statement, the connection in netstat does not go away until I physically close the application.

Is this right? Should I be doing something diffent on the client to force the connection to close?

So if the connection stays open, does it stay open for the duration of the openTimeout setting and then gets torn down?

Thanks.