如何从Linq to Entities得到生成的T-SQL语句

class Program
    {
        static void Main(string[] args)
        {
            BreakAwayEntities context = new BreakAwayEntities();
            var query = from r in context.Reservations join p in context.Payments on r.ReservationID equals p.ReservationID select new { r.Customer, p.Reservation };
            string sql = ((ObjectQuery)query).ToTraceString();
            Console.WriteLine(sql);
            Console.Read();
        }
    }