silverlight - RIA Service ObjectContext filter included records -

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using ria domain services entity framework 4, having trouble entity filtered related items.

for example, given: order table , product table (1 order has many products)

i have service returns order products loaded, e.g.

    public iqueryable<order> getorderbyid(int orderid)     {         return this.objectcontext.order                                  .include("products")                                  .where(n=>n.orderid == orderid);     }

question,

is there way filter products record in linq query in case? say, return order of specified id , include products prices higher 100.0; return empty/null products if there isn't any. point here return order though there isn't products meet criteria.

have tried this:

var query = o in objectcontext.order.include("products")             join p in objectcontext.product on o.productid equals p.productid             o.orderid == orderid , p.price > 100             select o;

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