<PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.2" />

System.Configuration.SettingsPropertyValue

public class SettingsPropertyValue
Contains the value of a settings property that can be loaded and stored by an instance of SettingsBase.
namespace System.Configuration { public class SettingsPropertyValue { public string Name { get; } public bool IsDirty { get; set; } public SettingsProperty Property { get; } public bool UsingDefaultValue { get; } public bool Deserialized { get; set; } public object PropertyValue { get; set; } public object SerializedValue { get; set; } public SettingsPropertyValue(SettingsProperty property); } }