<PackageReference Include="System.Configuration.ConfigurationManager" Version="4.5.0" />

ConfigurationLocation

public class ConfigurationLocation
namespace System.Configuration { public class ConfigurationLocation { private readonly Configuration _config; public string Path { get; } internal ConfigurationLocation(Configuration config, string locationSubPath) { _config = config; Path = locationSubPath; } public Configuration OpenConfiguration() { return _config.OpenLocationConfiguration(Path); } } }