https://blog.bredvid.no/validating-configuration-in-asp-net-core-e9825bd15f10 > Configuration has been greatly improved in .NET Core, compared with the .NET framework. In this blog post, I extend this by adding validation of configuration in order to get information about ill-configured applications as soon as possible, and as clearly as possible. It will help ensure that application configuration is in a well-defined state. > There’s a lot to be said about configuration in ASP.NET core, much of it is discussed in this excellent blog post: Deep Dive into Microsoft Configuration. Let’s focus on one area, which is having strongly typed configuration. Here’s a brief introduction to how it works.