Getting build errors with new Option page model

[ErikEJ]

I am trying to use this in an exsting extension, but getting build errors - what am I doing wrong?

CreatePkgDef : error : ArgumentException: The page class EFCorePowerTools.AdvancedOptions must derive from DialogPage.
   at Microsoft.VisualStudio.Shell.ProvideOptionDialogPageAttribute..ctor(Type pageType, String pageNameResourceId)
   at Microsoft.VisualStudio.Shell.ProvideOptionPageAttribute..ctor(Type pageType, String categoryName, String pageName, Int16 categoryResourceID, Int16 pageNameResourceID, Boolean supportsAutomation, String[] keywords)
   at Microsoft.VisualStudio.Shell.ProvideOptionPageAttribute..ctor(Type pageType, String categoryName, String pageName, Int16 categoryResourceID, Int16 pageNameResourceID, Boolean supportsAutomation)
   at System.Reflection.CustomAttribute._CreateCaObject(RuntimeModule pModule, IRuntimeMethodInfo pCtor, Byte** ppBlob, Byte* pEndBlob, Int32* pcNamedArgs)
   at System.Reflection.CustomAttribute.CreateCaObject(RuntimeModule module, IRuntimeMethodInfo ctor, IntPtr& blob, IntPtr blobEnd, Int32& namedArgs)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeType type, RuntimeType caType, Boolean inherit)
   at Microsoft.VisualStudio.Tools.CreatePkgDef.ProcessAssembly(String fileName, Hive hive, PkgDefContext context, Boolean register, RegistrationMode mode)
   at Microsoft.VisualStudio.Tools.CreatePkgDef.DoCreatePkgDef(InputArguments inputArguments)
   at Microsoft.VisualStudio.Tools.CreatePkgDef.Main(String[] arguments)	EFCorePowerTools			

internal class OptionsProvider
    {
        [ComVisible(true)]
        public class AdvancedOptions : BaseOptionPage<EFCorePowerTools.AdvancedOptions> { }
    }

    public class AdvancedOptions : BaseOptionModel<AdvancedOptions>, IRatingConfig
    {

[ErikEJ]

I had this:

    [ProvideOptionPage(typeof(AdvancedOptions), "EF Core Power Tools", "General", 100, 101, true)]
    [ProvideProfile(typeof(AdvancedOptions), "EF Core Power Tools", "General", 100, 101, true)]

Should have:

    [ProvideOptionPage(typeof(OptionsProvider.AdvancedOptions), "EF Core Power Tools", "General", 100, 101, true)]
    [ProvideProfile(typeof(OptionsProvider.AdvancedOptions), "EF Core Power Tools", "General", 100, 101, true)]