SiteMapProviderCollection.Add Method (ProviderBase)
Assembly: System.Web (in System.Web.dll)
provider is not an instance of the SiteMapProvider class.
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The SiteMapProviderCollection is read-only.
The SiteMapProviderCollection object that is returned by the Providers property is read-only. For this reason, you cannot use the Add and AddArray methods to add additional providers programmatically at run time. Therefore, the Add and AddArray methods are used only in scenarios where you manually create site map provider objects and manage them with an instance of the SiteMapProviderCollection class. The method checks the type of the specified provider, and then calls the Add(SiteMapProvider) method to add it to the collection.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.