刪除在DataContext的

Question

大宗物體的我無法刪除大宗物體的像

List<Person> prn = new List<Person>(); 
prn.Add(new Person { Id = "P007", name = "Andrew"}); 
prn.Add(new Person { Id = "P009", name = "Bernold"}); 
prn.Add(new Person { Id = "P010", name = "Hare"}); 
PersonDB.Persons.DeleteAllOnSubmit(prn); 
PersonDB.SubmitChanges(); 

我收到錯誤

Cannot remove an entity that has not been attached. 

Answer 1

嘗試attaching對象上下文刪除前：

PersonDB.Persons.AttachAll(prn, true);