Question

Is List<T>.Remove(T) faster than the List<T>.RemoveAt(int) method in .NET collections? Is speed different for value types or reference types?

Answer 1

List.Remove(T) uses IndexOf and RemoveAt(int) in its implementation. So List.RemoveAt(int) is faster.

public bool Remove(T item)
{
    int index = this.IndexOf(item);
    if (index >= 0)
    {
        this.RemoveAt(index);
        return true;
    }
    return false;
}