Can you initialize an array without specifying size ?

Answer 1

k.

Answer 2

In a list you do not need to predefine the size, you just can add to is. Do you know yhe size on initialisation ?

list<int> mylist = new list <int>;

https://www.dotnetperls.com/list

Answer 3

I meant it is known then ( when you use it ). It is of course runtime allocation.

Answer 4

Can you use a list ?

Answer 5

yes. since its size is predefined

Answer 6

True

Answer 7

Definitely use a List<T> any time you want to add/remove data, since resizing arrays is expensive. If you know the data is fixed length, and you want to micro-optimise for some very specific reason (after benchmarking), then an array may be useful.

List<T> offers a lot more functionality than an array (although LINQ evens it up a bit), and is almost always the right choice.

More on C# List : http://csharp.net-informations.com/collection/list.htm