<PackageReference Include="Microsoft.Extensions.Configuration" Version="11.0.0-rc.1.26425.128" />

Microsoft.Extensions.Configuration.ConfigurationBuilder

public class ConfigurationBuilder : IConfigurationBuilder
Builds key/value-based configuration settings for use in an application.
namespace Microsoft.Extensions.Configuration { public class ConfigurationBuilder : IConfigurationBuilder { public IList<IConfigurationSource> Sources { get; } public IDictionary<string, object> Properties { get; } public IConfigurationBuilder Add(IConfigurationSource source); public IConfigurationRoot Build(); public ConfigurationBuilder(); } }