javascript - 如何使用 JavaScript 将多个选择的值从一个实体更新到另一个实体

Question

Entity entity = _service.Retrieve("account", new Guid(old RecordId), new ColumnSet("new_multioption"));
Entity accountEntity = new Entity ("account", new Guid(New RecordId));

accountEntity["new_multioption"] = entity.GetAttributeValue<OptionSetValueCollection>("new_multioption");