Optionalnamespaces: NamespaceMapNamespaces and prefixes used.
Dispose the object.
It releases the managed resource and unregisters them from FinalizationRegistry. So the release of the managed resource won't need to wait until this object is garbage collected.
This needs to be called explicitly to avoid resource leak,
or declare the object with using declaration.
XPath object.
This object compiles the xpath at creation, which could be reused many times, even for different documents.
Note: This object requires to be disposed explicitly.