How does configuration work in ASP.NET Core?

ASP.NET Core configuration is flexible, layered, and environment-aware.

Follow :

It reads settings from multiple sources (JSON files, environment variables, command-line

args, etc.) and merges them into a single configuration object (IConfiguration).

Example:

In Program.cs:

var builder = WebApplication.CreateBuilder(args);

// Access configuration

var appName = builder.Configuration["AppSettings:Name"];

ASP.NET Core automatically loads: