How do you expose a LINQ query as an ASMX web service? Usually, from the business tier, I can return a typed DataSet or DataTable which can be serialized for transport over ASMX.

How can I do the same for a LINQ query? Is there a way to populate a typed DataSet or DataTable via a LINQ query?:

public static MyDataTable CallMySproc()    
{    
    string conn = ...;
   
MyDatabaseDataContext db = new MyDatabaseDataContext(conn);    
    MyDataTable dt =new MyDataTable();
    // execute a sproc via LINQ
    var query = from dr in db.MySproc().AsEnumerable
    select dr;
    // copy LINQ query resultset into a DataTable -this does not work !    
    dt = query.CopyToDataTable();
    return dt;
}