Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

IEnumerable<T>

The interface for anything you can loop over with foreach.

IEnumerable exposes GetEnumerator(), producing a sequence that foreach and LINQ consume.

Examples

  • IEnumerable<string> names = new List<string> { "Ana" }; can be walked with foreach, but has no Add.

Read the full section →