https://learn.microsoft.com/ja-jp/dotnet/api/system.xml.schema.xmlschemaunique?view=netframework-4.8.1&viewFallbackFrom=net-8.0
XmlSchemaUnique Class (System.Xml.Schema) | Microsoft Learn
Represents the unique element from XML Schema as specified by the World Wide Web Consortium (W3C). This class can be used to identify a unique constraint among...
class systemxml schemamicrosoftlearn