Allocate and use a simple array

ArrayPool.cs

private static void UsingSimpleArrays()
{
    Console.WriteLine(nameof(UsingSimpleArrays));
    for (int i = 0; i < 20; i++)
    {
        LocalUseOfArray(i);
    }
    Console.WriteLine();
    Console.WriteLine();
}

private static void LocalUseOfArray(int i)
{
    int[] arr = new int[ARRAYSIZE];
    ShowAddress($"simple array {i}", arr);
    FillTheArray(arr);
    UseTheArray(arr);
}