给定以下类结构publicclassParent{publicGuidId{get;publicListChildren{get;set;}}publicabstractclassBaseChild{publicintId{get;set;}publicstringChildName{get;set;}}publicclassNormalChild:BaseChild{publicDateTimeBirthDate{get;set;}}publicclassRichChild:BaseChild{publicListOffshoreAccounts{get;set;}}publiccl