<PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.5" />

ConfigurationExtensions

public static class ConfigurationExtensions
public static IConfigurationBuilder Add<TSource>(this IConfigurationBuilder builder, Action<TSource> configureSource) where TSource : IConfigurationSource

public static IEnumerable<KeyValuePair<string, string>> AsEnumerable(this IConfiguration configuration)

public static IEnumerable<KeyValuePair<string, string>> AsEnumerable(this IConfiguration configuration, bool makePathsRelative)

public static bool Exists(this IConfigurationSection section)

public static string GetConnectionString(this IConfiguration configuration, string name)

public static IConfigurationSection GetRequiredSection(this IConfiguration configuration, string key)