<PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.0-rc.1.25451.107" />

System.Configuration.DictionarySectionHandler

Provides key/value pair configuration information from a configuration section.
namespace System.Configuration { public class DictionarySectionHandler : IConfigurationSectionHandler { protected virtual string KeyAttributeName { get; } protected virtual string ValueAttributeName { get; } public virtual object Create(object parent, object context, XmlNode section); public DictionarySectionHandler(); } }