How can I add to a List's first position?

Question

I just have a List<T> and I would like to add an item to this list but at the first position.
MyList.add() adds the item as the last. How can I add it as the first?.

Thanks for help!

Answer 1

List<T>.Insert(0, item);

Answer 2

 myList.Insert(0, item);

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This does involve shifting all the contents of the List internally so if you do this a lot (ie only add to the front) you might consider using a Stack<T> or a regular List that you read backwards or reverse at some opportune moment.

I would stay away from LinkedList (as long as i could).

Answer 3

Use List.Insert(0, ...). But are you sure a LinkedList isn't a better fit? Each time you insert an item into an array at a position other than the array end, all existing items will have to be copied to make space for the new one.

Answer 4

Use List<T>.Insert(0, item) or a LinkedList<T>.AddFirst().

Answer 5

You do that by inserting into position 0:

List myList = new List();
myList.Insert(0, "test");

Answer 6

Use Insert method: list.Insert(0, item);

Answer 7

Of course, Insert or AddFirst (for a LinkedList) will do the trick, but you could always do:

myList.Reverse();
myList.Add(item);
myList.Reverse();

Note that while this will get you there eventually, it sure is not the most effective way to go ;).