How can I optimize collection performance in C#?

How can I optimize collection performance in C#?

To optimize collection performance in C#, consider using the right collection type for your needs, such as List<T>, HashSet<T>, or Dictionary<TKey, TValue>.

What are the differences between List and HashSet?

List<T> is ordered and allows duplicates, while HashSet<T> is unordered and does not allow duplicates, making HashSet faster for lookups.

Are there any specific methods to improve List performance?

Yes, you can use methods like 'Capacity' to avoid resizing, and 'Sort' for efficient sorting. Also, consider using 'AsSpan' for slicing.

What about memory usage? How can I reduce it?

To reduce memory usage, avoid unnecessary allocations, use value types when possible, and consider using memory pools for large collections.