One of the nicest things about ASP.NET Core is the availability of certain singleton models that greatly simplify some very common developer needs. Given that (depending on who you ask) one of the two hardest problems in computing is caching¹, it’s extremely helpful that ASP.NET Core ships with several models for caching data, chief of which are IMemoryCache and IDistributedCache, added to an ASP.NET Core application via dependency injection and then available to both the framework and the application itself. Although these two expose almost identical APIs, they differ rather significantly in semantics.²

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1. Although that *probably* refers more to cache coherence rather than simply key-value persistence, to be perfectly frank. ↩

2. It is extremely refreshing to see Microsoft adopting the Haskell/Rust approach of using types to express/convey intention and semantics rather than merely shape. ↩