In a Flutter app, if you need to ensure file operations do not block the main UI thread, which programming concept should you use?

To ensure file operations do not block the main UI thread in a Flutter app, you should use Isolates. Isolates are Dart's solution for concurrent programming, providing a separate memory heap and running in their own threads. By isolating file operations in a separate isolate, you prevent them from affecting the main UI thread, ensuring a smooth and responsive user interface. Understanding isolates is crucial for handling tasks that may cause delays without compromising the app's performance.