The system of random loot in the chest (Unity3D, C #)

In my opinion the simplest, maybe not the most correct, solution is to take and generate numbers from 1 to 155, and then look if the number is in between:

• from 1 to 65 - Обычная
• from 66 to 110 - Рарная
• from 111 to 135 - Мистическая
• from 136 to 150 - Эпическая
• from 151 to 155 - Легендарная

Naturally, the sequence of numbers can be changed and, for example, for Легендарной compared with numbers like 33, 111, 145, 1, 7 . For the rest ask your numbers

What to say about:

For example, in the future, categories of items may increase and the chances of changing.

Create a Category class in it should be the property Chance (Chance), then we take all the categories and sum up the "chances", we get the upper threshold for generating numbers

For

For example, a regular chest has 10 cells, and in this chest 10 random items can fall out.

it is possible to call for each cell in the loop the code that will return the item

UPD

 class Category { private int[] chanceValues; public Category(string name, int chance){ Name = name; Chance = chance; chanceValues = generateChanceValues(chance); } public string Name { get; private set; } public int Chance { get; private set; } private int[] generateChanceValues(int count){ int[] res = new int[count]; Random random = new Random(); for (int i = 0; i < count; count++){ res[i] = random.Next(1, 101); } return res; } public bool IsGenerateLoot(int number){ if (chanceValues == null) return false; return chanceValues.Contains(number); } }