<PackageReference Include="System.Xml.XmlDocument" Version="4.0.1-beta-23409" />

System.Xml.XmlNodeChangedAction

public enum XmlNodeChangedAction
Specifies the type of node change.
Change = 2

A node value is being changed.

Insert = 0

A node is being inserted in the tree.

Remove = 1

A node is being removed from the tree.