Cache-Aside Pattern example using IDistributedCache.

This simple example uses an InMemory implementation of IDistributedCache.

Topics:

• Adding DistributedMemoryCache to DI Container
• Injecting IDistributedCache into endpoint
• Usage of 'IDistributedCache.GetString(key)'
• Usage of 'IDistributedCache.SetString(key, string, CacheOptions)'
• Expiration/Eviction

This can be used to cache serialized objects in the form of json strings.