<PackageReference Include="System.Xml.ReaderWriter" Version="4.0.11-beta-23409" />

XmlSchemaForm

public enum XmlSchemaForm
Indicates if attributes or elements need to be qualified with a namespace prefix.
None = 0

Element and attribute form is not specified in the schema.

Elements and attributes must be qualified with a namespace prefix.

Elements and attributes are not required to be qualified with a namespace prefix.