EnumerableExtensions

Status

Note: The project currently does not include a dedicated EnumerableExtensions.cs source file. This document is a placeholder that describes expected enumerable helpers; update or remove when the implementation changes.

Typical Helpers (suggested)

If you add enumerable helpers, consider providing these APIs:

• bool None<T>(this IEnumerable<T> @this, Func<T, bool> filter = null) — Returns true when sequence contains no elements or no elements matching filter.
• bool AllUnique<T>(this IEnumerable<T> @this) — Returns true if all elements are unique.
• bool AllUniqueSorted<T>(this IList<T> @this) — Returns true if sorted list contains no adjacent duplicates.
• T LastButOne<T>(this IEnumerable<T> @this) — Returns the second-to-last element or default.

Recommendations

• If you implement these helpers, include unit tests and document behavior for null sequences and empty sequences.