AggregateOn GroupByType.AggregateOn property public AggregateOnType AggregateOn { get ; set ; } 也可以看看 class Aggregate......AggregateOnType class GroupByType 命名空间 Aspose.Email.Clients.Exchange.WebService...WebService.Schema_2016 部件 Aspose.Email GroupByType GroupsToExpand 简体中文...