Gruping

Out implementation of LINQ's IGrouping<K,T>, and the one that uses Signum.Engine LINQ Provider.

It inherits from List<T> so if you feel like hacking with undocumented APIs, you can downcast and add some elements more if you want ;)

public class Grouping<K, T> : List<T>, IGrouping<K, T>
{
    public Grouping(K key)
    public Grouping(K key, IEnumerable<T> values)
    public K Key {get;}
    (...)
}