<PackageReference Include="System.Configuration.ConfigurationManager" Version="4.7.0-preview3.19551.4" />

IConfigurationManagerInternal

Defines an interface used by the .NET Framework to initialize configuration properties.
namespace System.Configuration.Internal { public interface IConfigurationManagerInternal { bool SupportsUserConfig { get; } bool SetConfigurationSystemInProgress { get; } string MachineConfigPath { get; } string ApplicationConfigUri { get; } string ExeProductName { get; } string ExeProductVersion { get; } string ExeRoamingConfigDirectory { get; } string ExeRoamingConfigPath { get; } string ExeLocalConfigDirectory { get; } string ExeLocalConfigPath { get; } string UserConfigFilename { get; } } }