IConfiguration is internally registered as singleton/scoped/transient ?

[abhay-profile]

I have researched and found on articles IConfiguration is registered as singleton but when I change something in appsettings IConfiguration gives updated value without rebuilding application. So it has to be atleast scoped ? I am confused please anyone explain this behaviour.

[gfoidl]

Even when a object is a singleton it's properties can be updated. The configuration objects isn't immutable / readable in that sense, and can be updated. That's the behavior you observe.

See e.g. JSON configuration provider with it's reloadOnChange setting.

Further have a look at Options pattern in ASP.NET Core to see the various possibilities of using monitored settings, etc.