System.Xml [00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00] 1.0.5000.0 2.0.0.0 4.0.0.0 To be added System.Xml.Schema.XmlSchemaIdentityConstraint Specifies that an attribute or element value (or a combination of attribute or element values) must be unique within the specified scope. The constraint name must be unique within a schema. 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 a set of elements. Constructor 1.0.5000.0 2.0.0.0 4.0.0.0 To be added Initializes a new instance of the class.