Split List into Sublists with LINQ

Question

Is there any way I can separate a List into several separate lists of SomeObject, using the item index as the delimiter of each s

Answer 1

We can improve @JaredPar's solution to do true lazy evaluation. We use a GroupAdjacentBy method that yields groups of consecutive elements with the same key:

sequence
.Select((x, i) => new { Value = x, Index = i })
.GroupAdjacentBy(x=>x.Index/3)
.Select(g=>g.Select(x=>x.Value))

Because the groups are yielded one-by-one, this solution works efficiently with long or infinite sequences.