LINQ query — Data aggregation (Group Adjacent)

Question

Let\'s take a class called Cls:

public class Cls
{
    public int SequenceNumber { get; set; }
    public int Value { get; set; }
}

Answer 1

MoreLinq provides this functionality out of the box

It's called GroupAdjacent and is implemented as extension method on IEnumerable:

Groups the adjacent elements of a sequence according to a specified key selector function.

enumerable.GroupAdjacent(e => e.Key)

There is even a Nuget "source" package that contains only that method, if you don't want to pull in an additional binary Nuget package.

The method returns an IEnumerable>, so its output can be processed in the same way output from GroupBy would be.