Adds a named code entity or type mapping to the System.Xml.Serialization.CodeIdentifiers instance's scope.
Unlike the CodeIdentifiers.AddUnique(string, object) method, the CodeIdentifiers.Add(string, object) method does not prevent naming collisions.
If you want to control the names of code entities that are bound to XML Schema or Web service definitions, use the associated attributes rather than creating an instance of the System.Xml.Serialization.CodeIdentifiers class. For a complete list, see Attributes That Control XML Serialization.