https://learn.microsoft.com/ru-ru/dotnet/api/system.xml.schema.xmlschemacomplexcontentextension.attributes?view=netframework-3.5
XmlSchemaComplexContentExtension.Attributes Property (System.Xml.Schema) | Microsoft Learn
Gets the collection of attributes for the complex content. Contains XmlSchemaAttribute and XmlSchemaAttributeGroupRef elements.
property systemxml schemaattributesmicrosoftlearn