<PackageReference Include="System.Configuration.ConfigurationManager" Version="4.7.0-preview1.19504.10" />

ProtectedConfigurationProviderCollection

public class ProtectedConfigurationProviderCollection : ProviderCollection
Provides a collection of ProtectedConfigurationProvider objects.
public ProtectedConfigurationProvider this[string name] { get; }

Gets a ProtectedConfigurationProvider object in the collection with the specified name.

public ProtectedConfigurationProviderCollection()

Initializes a new instance of the ProtectedConfigurationProviderCollection class using default settings.