What is this array error?

Question

C++ / C#

https://pastebin.com/8CK4DpXi
(If anything, I made a save according to this lesson https://www.youtube.com/watch?v=IJsBkWC0krA timecode +- 15:00, I don’t know how, but MB will help)

Answer 1

sv.SkinPrice = new int[4];
for (int i = 0; i < SkinPrice.Length; i++){
      sv.SkinPrice[i] = SkinPrice[i];
}

Answer 2

Array index out of range