When overridden in a derived class, retrieves the root node of all the nodes that are currently managed by the current provider.
Assembly: System.Web (in System.Web.dll)
The method enables a parent provider in a provider hierarchy to obtain a SiteMapNode object that acts as a frame of reference for building the provider hierarchy and the larger site map node hierarchy that is the sum of the site map data that each provider manages.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.