LINQ Group By & max question

See more:

C#

.NET

LINQ

.NET4

Hello

I've got a list:

ID--------Date-----------NumValue
1---------2/2/2013----------0
1---------2/2/2013----------2
1---------1/1/2013----------4
2---------10/5/2009---------3
2---------01/01/2005--------4

I'd like to get back all the line items with the max(not necessarily one) date value

so the aim is to get back 0th 1 st 3 rd line
the weak attempt as follows:

var plpo1 = (from y in plpo0
    group y by new { y.tervcsop, } into grouped
          let maxdate = grouped.Max(y => y.maxdate)
                          orderby maxdate descending
                                select new
                                {
                                    tcs = grouped.Key.tervcsop,
                                    md = maxdate,
                                    norm = grouped.Select(x => x.normaertek)

                                }).ToList();

                   var plpo2 = plpo1.Where(x => x.md == plpo1.Max(o => o.md));

thanks for sharing the ideas