array of string with unknown size

How is an array of string where you do not know where the array size in c#.NET?

String[] array = new String[]; // this does not work

Is there a specific reason why you need to use an array? If you don't know the size before hand you might want to use List<String>

List<String> list = new List<String>();

list.Add("Hello");
list.Add("world");
list.Add("!");

Console.WriteLine(list[2]);

Will give you an output of

!

MSDN - List(T) for more information

You don't have to specify the size of an array when you instantiate it.

You can still declare the array and instantiate it later. For instance:

string[] myArray;

...

myArray = new string[size];

You can't create an array without a size. You'd need to use a list for that.