GetOrAdd Ran My Factory Three Times

I had a client object that was expensive to build. It opens a pooled connection, reads a bit of config, and I only ever want one per name for the life of the process. So I did the obvious thing and cached it in a ConcurrentDictionary , keyed by name, built on first use with GetOrAdd . Thread-safe dictionary, lazy construction, done. Then I noticed the startup logs. For a single key, "opening…