In the RC1 of EntityFramework 7, released yesterday, Cascade Delete was added.

To disable it per relationship, I can use :

```
      builder.Entity<Site>().HasOne(e => e.Person)
      .WithMany(x => x.Sites).Metadata.DeleteBehavior = DeleteBehavior.Restrict;

```

I want to disable it globally for a DbContext, but I didn't find a way. How can I do ?