System\Linq\Enumerable.cs (4)
785return new GroupedEnumerable<TSource, TKey, TSource, TResult>(source, keySelector, IdentityFunction<TSource>.Instance, resultSelector, null);
789return new GroupedEnumerable<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, null);
793return new GroupedEnumerable<TSource, TKey, TSource, TResult>(source, keySelector, IdentityFunction<TSource>.Instance, resultSelector, comparer);
797return new GroupedEnumerable<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);