<PackageReference Include="Microsoft.Extensions.Configuration" Version="10.0.0-rc.1.25451.107" />

ChainedBuilderExtensions

public static class ChainedBuilderExtensions
Provides extension methods for adding IConfiguration to an IConfigurationBuilder.
public static IConfigurationBuilder AddConfiguration(this IConfigurationBuilder configurationBuilder, IConfiguration config)

Adds an existing configuration to configurationBuilder.

public static IConfigurationBuilder AddConfiguration(this IConfigurationBuilder configurationBuilder, IConfiguration config, bool shouldDisposeConfiguration)

Adds an existing configuration to configurationBuilder.