How and when to abandon the use of arrays in C#?

Question

I\'ve always been told that adding an element to an array happens like this:

An empty copy of the array+1element is created and then the data from t

Answer 1

When the array is resized, a new array must be allocated, and the contents copied. If you are only modifying the contents of the array, it is just a memory assignment.

So, you should not use arrays when you don't know the size of the array, or the size is likely to change. However, if you have a fixed length array, they are an easy way of retrieving elements by index.