The PortalSiteMapProvider class is the base provider used by the four default “CMS” SiteMapProviders: GlobalNavSiteMapProvider CombinedNavSiteMapProvider CurrentNavSiteMapProvider CurrentNavSiteMapProviderNoEncode That is, all of these SiteMapProviders use the same base code to generate a data source, but their “output” differs slightly due to the different attributes that are applied. Recently, we wanted to filter out the pages [...]