using System;

using System.Collections.Generic;

​

public class Item {

    private bool rare;

    private Item(bool rare) {

    this.rare = rare;

    }

    private static int rarecount=0;

    private static int commoncount=0;

    private static Random rnd= new Random();

    public static Item CreateItem(){

        Item item;

        int chance =rnd.Next(1,11);

        if (chance>2){

            item = new Item(false);

            commoncount++;

        }

        else {

            item=new Item(true);

            rarecount++;}

        return item;

    }

    public static void PrintItemStats(){

​

        Console.WriteLine("common ="+commoncount+" rare="+rarecount);

    }

}

​

​

public class Program

{

    public static void Main()

    {   

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

            Item item = Item.CreateItem();

        }

        Item.PrintItemStats();

​

​

    }

}