From the documentation:

When an entity has 1:m or m:n relations with other entities, it will expose properties which in turn will return an EntityCollection."

How can i prevent the entity collection to be filled with the related entitites?

I don't want the bound datagrid to shows all my database on user's request.

Thanks

Gabor

In adapter you have to fill them, otherwise they're empty. In selfservicing they're loaded on the fly, which is called lazy loading.