Back in the days of yore, ASP.NET applications used .config XML files for handling config values. While file based configuration is still around today, the use of middleware and dependency injection has revolutionized how ASP.NET Core apps handle configuration. In addition, it has become necessary to decentralize configuration handling due to microservices and other distributed architecture. This talk will provide an overview of configuration providers for ASP.NET core apps including file-based, in-memory, environmental and cloud-based providers.