How would you iterate through a SortedList<TKey, TValue>?

Short answer: You can use a foreach loop over KeyValuePair<TKey, TValue> elements, which iterates in sorted key order: foreach (var kvp in sortedList) { Console.WriteLine($"Key: {kvp.Key}, Value: {kvp.Value}"); } You can also iterate over keys or values separately: foreach (var key in sortedList.Keys) { /* ... */ }

Example code

foreach (var value in sortedList.Values) { /* ... */ } 📘 C# SortedSet<T> – Interview Questions & Answers

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.