<PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.4" />

System.Configuration.Provider.ProviderBase

public abstract class ProviderBase
Provides a base implementation for the extensible provider model.
namespace System.Configuration.Provider { public abstract class ProviderBase { public virtual string Name { get; } public virtual string Description { get; } public virtual void Initialize(string name, NameValueCollection config); protected ProviderBase(); } }