打印Linq生成的SQL语句

var t1 = source.OrderBy<T>(orderby).Skip<T>(_skip).Take<T>(_take);
var t2 = t1.ToObjectQuery().ToTraceString();

不要用:
 source = source.OrderBy<T>(orderby).Skip<T>(_skip).Take<T>(_take).Future<T>().AsEnumerable().AsQueryable<T>();