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Collections
C# Collections
How do you remove elements from a List<T> in C#?
Short answer: Use methods like: Remove(item) – removes first occurrence RemoveAt(index) – removes by index RemoveAll(predicate) – removes all matching a condition Clear() – removes all items
Example code
numbers.Remove(10); numbers.RemoveAt(0); numbers.RemoveAll(x => x > 100); numbers.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
- Define — one clear sentence (the short answer above).
- Example — relate it to a project like ShopNest or your real work.
- Trade-off — when you would not use it.
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