我有这个疑问：

  INT maxShoeSize = Workers.Where（X =＆GT; x.CompanyId == 8）的.max（X =＆GT; x.ShoeSize）;
 

将在 maxShoeSize 如果公司8没有工人呢？

更新： 我怎样才能修改查询，以获得0，而不是一个例外？

  INT maxShoeSize = Workers.Where（X =＆GT; x.CompanyId == 8）
                         。选择（X =＆GT; x.ShoeSize）
                         .DefaultIfEmpty（0）
                         的.max（）;
 

在零 DefaultIfEmpty 是没有必要的。

I have this query:

int maxShoeSize=Workers.Where(x=>x.CompanyId==8).Max(x=>x.ShoeSize);

What will be in maxShoeSize if company 8 has no workers at all?

UPDATE: How can I change the query in order to get 0 and not an exception?

int maxShoeSize = Workers.Where(x => x.CompanyId == 8)
                         .Select(x => x.ShoeSize)
                         .DefaultIfEmpty(0)
                         .Max();

The zero in DefaultIfEmpty is not necessary.