entity framework - how to ignore/avoid/skip child collection from a LINQ query? -

i have collection :

order o1 o2 o3 

i have orderitem collection :

orderitem orderid oitem1    o1 oitem2    o1 oitem3    o1 oitem4    o2 oitem5    o3 

now selecting orders line, how skip/avoid/ignore child collection linq

i don't want orderitems orders .