Read and use settings from appsettings.json without IOptions?

Question

.NET Core allows to lazily read settings from configuration file, de-serialize it to a POCO and register that POCO in built-in DI container with one line of code:

Answer 1

You can just mock IOptions if you want to unit test services that depend on it. See this question and its answers. Depending on IOptions is still just depending on an interface, so it's not (or shouldn't be) making your code harder to test.