I am new to LINQ and EF and I have a quick question about a forum I am developing. On this forum there are topics, and each topic has associated replies. I assumed that EF would see the constraint and when deleting the topic would also delete the associated replies. Instead it throws a constraint error. Is there an easy way to delete all associated replies without looping through them and marking each one for deletion?

For instance, in SQL I would just do something like this:

```
DELETE FROM topic_replies WHERE TopicID='999'
DELETE FROM topics where TopicID='999'

```

But in EF, the only way I know to do this is:

```
Topic topic = //LINQ to get topic.
foreach (Reply reply in topic.Replies)
{
     dbEntity.Replies.DeleteObject(reply);
}
dbEntity.Topics.DeleteObject(topic);

```

I guess this is fine if this is what I have to do. Just curious if there is a better way. Thanks in advance.