Answer
IOptions: Singleton config.
IOptionsSnapshot: Reload per request.
IOptionsMonitor: Real-time config with change notifications.
Quick Answer
IOptions is singleton — reads config at startup. IOptionsSnapshot is scoped — reflects config changes between requests (requires file-based config with reloadOnChange: true). IOptionsMonitor is singleton with a reactive change callback — use it in singletons that need to react to configuration changes without restarting.
S
SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ