System\Linq\Enumerable.cs (4)
769return new GroupedEnumerable<TSource, TKey, TSource>(source, keySelector, IdentityFunction<TSource>.Instance, null);
773return new GroupedEnumerable<TSource, TKey, TSource>(source, keySelector, IdentityFunction<TSource>.Instance, comparer);
777return new GroupedEnumerable<TSource, TKey, TElement>(source, keySelector, elementSelector, null);
781return new GroupedEnumerable<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);