Question

Given a list of objects with a date and decimal, I would like to index these objects by the year, month, dayofweek and hour of the date. In .NET 2.0, I would have created this graph using a set of nested dictionaries and a list as the leaf node. I am interested in how this could be done with LINQ.

Answer 1

Do you mean something like this?

var grouping = from item in myList
               group item by new { item.Date.Year, item.Date.Month, item.Date.DayOfWeek, item.Date.Hour }
               into groupedItems
               select groupedItems;