https://github.com/dotnet/runtime/blob/main/docs/design/specs/Memory-model.md describes how Object assignment to a location potentially accessible by other threads is a release with respect to accesses to the instance’s fields/elements and metadata. But this method only uses the local variable value for locking. Any updates to value will not be seen by other threads. It seems like this might be possible:

1. Thread 1 sees _importsCache == null and value == null and enters the first conditional
2. Thread 2 sees _importsCache == null and value == null and enters the first conditional too
3. Thread 1 takes the lock, sees value == null and initializes _importsCache to a new dictionary
4. Thread 2 takes the lock, see the local variable value is still null, and then re-initializes _importsCache to another value.

Is this correct/possible?