using System;

public class Item {

private static bool rare;

    private static int count_rare;

    private static int count_common;

    public static Random rnd = new Random();

    private Item(bool Rare) {

rare = Rare;

}

​

    public static Item CreateItem(){

        int prob;

        prob = rnd.Next(1,11);

        if(prob<=8){

        count_common++;

            return new Item(!rare);

        }

        else {

        count_rare++;

            return new Item(rare);

        }

    }

}

​

public class Program

{

public static void Main()

{

for (int i=0;i<100;i++) {

Item item = Item.CreateItem();

}

Item.PrintItemStats();

}

}