How do you add elements to the start or end of a LinkedList<T>?
- Use AddFirst(value) to add at the start.
- Use AddLast(value) to add at the end.
numbers.AddFirst(5); // Adds 5 at the beginning
numbers.AddLast(30); // Adds 30 at the end
numbers.AddFirst(5); // Adds 5 at the beginning
numbers.AddLast(30); // Adds 30 at the end