Covariant returns https://josef.codes/c-sharp-tips-and-tricks-01-covariant-return-types/ Named Tuples https://josef.codes/c-sharp-tips-and-tricks-02-named-tuples/ Deserialization https://josef.codes/protect-yourself-when-deserializing-system-text-json/ Prefix IDistributedCache keys https://josef.codes/prefix-idistributedcache-keys/