Removes the System.Web.SiteMapNode object at the specified index of the collection.
You can test whether a System.Web.SiteMapNodeCollection collection is read-only by checking the SiteMapNodeCollection.IsReadOnly property.
To remove an element from the System.Web.SiteMapNodeCollection by specifying a System.Web.SiteMapNode object to remove, use the SiteMapNodeCollection.Remove(SiteMapNode) method.