back to arays

[Max Samuha]

I thought array references are similar to object references like in C#
(actually, thay are object references in C#) and that was my mistake:

int[] a = new int[20];
int[] b = a;

a.length = 40; // a is copied and b is not updated to point to a's
data;

Does it mean that anytime i change an array, i have to manually update
all references to it or should i wrap my array in an Array class so
that all references to any instance of that array remain valid?

If the question have been already discussed please refer me to the
right thread. Thanks