How do you clear a List<T>?

Short answer: Use the Clear() method to remove all elements. list.Clear(); Use the Clear() method to remove all elements.

Example code

list.Clear(); Use the Clear() method to remove all elements. Example: list.Clear(); Use the Clear() method to remove all elements. Example: list.Clear();

Real-world example (ShopNest)

In ShopNest, an order page loads products with List<Product> so you can Add items to the cart and access them by index. Use IEnumerable<T> when you only need to loop (for example, printing invoice lines).

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.