select * from stuInfo where stuNo not in(select stuNo from StuMarks)
怎么用 Linq 进行书写。 求解谢谢！
------解决方案--------------------------------------------------------
all的写法：
var query = db.stuInfo.Where(x => db.StuMarks.All(y => y.stuNo != x.stuNo));
join的写法
- C# code
var query = from x in db.stuInfo join y in db.StuMarks on x.stuNo equals y.stuNo into j from item in j.DefaultIfEmpty(default(StuMark类型)) where item == default(StuMark类型) select x;