Fix InvalidOperationException

✅ Solution

InvalidOperationException in Azure Functions often stems from concurrent access or modification of shared resources, especially during startup or shutdown processes. To fix this, implement proper locking mechanisms (e.g., using `AsyncLock` or `SemaphoreSlim`) to serialize access to critical shared resources or collections. Ensure that background tasks or threads using shared resources gracefully terminate before the host shuts down to prevent race conditions and incomplete operations.