Configuring options

Configuration in ASP.NET Core is designed to be flexible, allowing you to load settings from various sources such as JSON files, environment variables, command-line arguments, and more.

Configuration can be accessed using the IConfiguration interface, which allows you to retrieve configuration values easily.

Configuration sources

ASP.NET Core can load configuration from multiple sources, as shown in Table 8.2:

Source	Description
appsettings.json file	The most common source for configuration, typically containing environment-specific settings.
Environment variables	Useful for settings that vary by environment, especially in containerized or cloud environments.
Command-line arguments	Allows passing configuration settings via command-line during application startup.
Secrets manager	Used primarily in development to store sensitive data.
Custom providers	You can create your own configuration providers to load settings from custom sources like databases or...