IntArray
To represent a list of int values, BI#
                offers the IntArray type. To create an empty IntArray object, you can use the CreateIntArray function. Alternatively, you can create and initialize
                an IntArray object through a list of numbers in
                square brackets:
void IntArrayDemo()
{
    IntArray numbers = [1, 2, 42];
    foreach (int x in numbers)
    {
        WriteLine(x);
    }
    WriteLine("numbers contains " + Count(numbers) + " elements.");
}