Hello,
I need a piece of advice on a problem that I have.
I read a list of numbers from a txt file, this list changes over time.
For each number of this list (I don't' know how many they are, they can be 10 or 200) I have to create a new array where I have to put inside other values. I don't want to use a muldimensional array because I have to to know often how many values I have in each array and add o remove new values inside of it. I have thought to use the collection, but i'have read that are slow.

How can I declare the arrays without know how many I need?

Thanks in advance for the answer.

Claudio.