I one thread enters a function in a class and calls AcquireReaderLock on a moduel level static ReaderWriterLock object, and then another thread enters a function in the same class and attempts to update to a module level variable while the reader lock is still in place, shouldn't an error get thrown? It doesn't in my testing.

Are you complaining that an error does not get thrown when you attempt to update the variable?

Exceptions are thrown when you attempt to acquire the lock and the timeout expires - the only link that exists to a resource is by convention.

Perhaps if you post some code...

Jeff Mason
Custom Apps, Inc.
www.custom-apps.com