A read-only node is one whose properties, attributes, or child nodes cannot be changed. You can remove a read-only node from the tree and insert it somewhere else. For example, Entity nodes are always read-only.
This property is a Microsoft extension to the Document Object Model (DOM).
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)