In June 2025, Artem Melnikov enhanced the dotnet/orleans repository by developing a snapshotting-based ObserverManager to address concurrency challenges in observer pattern implementations. He introduced a mechanism that safely manages concurrent modifications, such as subscriptions and unsubscriptions, during enumeration, thereby reducing the risk of runtime errors in multi-threaded environments. Artem validated this approach with comprehensive unit tests, ensuring robust handling of edge cases and concurrent modification scenarios. His work leveraged C# and focused on asynchronous programming, concurrency, and design patterns, demonstrating a thoughtful approach to thread safety and laying a solid foundation for future concurrency improvements within the codebase.