Hi Russell,

>Does this have implicatons in a multithreading situation?

No. Like most other settings the class library settings is stored in the Thread Local Storage of the DLL. It's scoped to the DLL and thread.

> Kind of odd to just close these and reopen them.

It's not that bad. When you monitor disk activities, you can see that NEWOBJECT() doesn't physically access all files that have been loaded previously. It does, however, always check for the existence of the class library on disk, even when the class library is already loaded.