我有许多EntityFramework表，我已经使用它们的部分类来支持接口(interface)IHistoricEntity。IHistoricEntity具有ActiveToDatetime?属性。//AutogeneratedLINQtoEntitiesdomainservice:[EnableClientAccess()]publicpartialclassProductService:LinqToEntitiesDomainService{publicIQueryableGetANALYSIS_CODES(){returnthis.ObjectContext.ANALYSIS

我有许多EntityFramework表，我已经使用它们的部分类来支持接口(interface)IHistoricEntity。IHistoricEntity具有ActiveToDatetime?属性。//AutogeneratedLINQtoEntitiesdomainservice:[EnableClientAccess()]publicpartialclassProductService:LinqToEntitiesDomainService{publicIQueryableGetANALYSIS_CODES(){returnthis.ObjectContext.ANALYSIS