How would you design a distributed caching invalidation strategy across multiple regions in .NET Core?

Design distributed cache invalidation across multiple regions using centralized cache coordination, event-driven invalidation, versioned cache keys, pub/sub messaging, and eventual consistency mechanisms.

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In multi-region .NET Core applications, cache invalidation becomes challenging because cached data may exist in:

The goal is to ensure:

Common distributed cache technologies include:

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1. Use Distributed Cache Instead of Local Memory Cache

Bad approach:…