LINQ to Entities 不识别方法

               var query = (from s in _context.Series

                            where SqlMethods.Like(s.Abbreviation.Substring(0,2), "[0-9]")

                            select s).OrderBy(s => s.Abbreviation).ToList();

               seriesList = query.OrderBy(s => s.Abbreviation).ToList();

想查出来首字母是数字的·怎么查啊·请赐教·不要.ToList()之后判断

------解决方案--------------------
where SqlMethods.Like(s.Abbreviation, "[0-9]%")