# Custom Implementation of REN In-Memory Cache Service

While REN’s standard in-memory cache service is ready-to-use out of the box, you are not limited to the defaults.\
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**REN is designed for extensibility and flexibility:** you can easily extend or override the default in-memory cache service to match your own project’s requirements.

For example, you might want to:

* Add extra logging, monitoring, or custom eviction strategies,
* Enrich your cache operations with additional business logic,
* Or adapt caching to specific use cases (such as multi-tenant scenarios).

To do so, you can simply **inherit from the provided `RENInMemoryCacheService`** or implement the `IRENCacheService` interface with your own logic.\
Just register your custom implementation during service configuration—REN will seamlessly use your extended or overridden service wherever caching is needed.

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## **Pro Tip:**

Extension and override patterns make REN super flexible for enterprise-grade needs without sacrificing simplicity for smaller projects.
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