Linq-to-SQL Grouping not ordering correctly

Hi can someone help开发者_高级运维 me convert this tsql statement into c# linq2sql?

select [series] from table group by [series] order by max([date]) desc

This is what i have so far - the list is not in correct order..

            var x = from c in db.Table
                    orderby c.Date descending 
                    group c by c.Series into d
                    select d.Key;

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Your LINQ orderby clause isn't doing the same thing as your SQL one. Here, this should fix it:

var query = from c in db.Table
            group c by c.Series into d
            orderby d.Max(item => item.Date) descending
            select d.Key;