BACKND BaseRequired Knowledge for BACKNDParamAdd NullVersion: 5.11.8On this pageAddNullpublic void AddNull(string key);ParameterValueTypeDescriptionkeystringKey valueDescriptionAdds an empty column to Param. The key must not begin with a number. If it does, a warning is displayed and it is not added to Param. ExampleParam param = new Param();param.AddNull(string key);