Controls whether this Web site should display siblings of the current Web site in current navigation.
Assembly: Microsoft.SharePoint.Publishing (in Microsoft.SharePoint.Publishing.dll)
Current navigation normally starts at the current Web site, so only this Web site and those items beneath it would be visible. This property forces the starting node up one level so that siblings of the current Web site are available. Any children of the sibling nodes are automatically removed.
To save changes after setting this property, call the Update method.