Linq group by query

Question

Trying to work out a linq query and was wondering if you guys could help.

I have a list of objects foo and each foo object has a list of <

Answer 1

Looks like you want:

var query = from foo in list
            from bar in foo.Bars
            group bar.Value by bar.Date into dates
            select new { Date = dates.Key, Sum = dates.Sum() };