Null method allows to serialize null or nil like values.

Use Null method if a nil object reference need to be serialized. Null is a low-level method, which is used by the serialization engine itself when serializing nil object values. So, its perfectly valid to use Value method instead of Null method to serialize null values:

Delphi	Copy Code
S.Value<TObject>(nil);

Reference

• Value
• TSerializer Class
• NG.Serialization Namespace