IConfiguration
IConfiguration is a core interface in the Microsoft.Extensions.Configuration namespace that represents a hierarchical, key-value configuration store. It provides a unified abstraction for accessing configuration data from multiple sources, including JSON files, environment variables, command line arguments, and in-memory collections. An IConfiguration instance exposes values through an indexer and a Value property, enabling retrieval and, where supported by the underlying provider, modification of configuration values.
The interface supports hierarchical sections through GetSection(string key), which returns an IConfigurationSection. Consumers can traverse the
IConfiguration is typically implemented by various configuration providers and composed by higher-level builders, such as ConfigurationBuilder.
In summary, IConfiguration provides a standardized, provider-agnostic interface for accessing, navigating, and optionally mutating configuration data