using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

​

namespace It_sSomething

{

    class Item

    {

        public int Weight { get; set; }

    }

    class Weapon : Item

    {

        public string Class { get; set; }

        public int Damage { get; set; }

    }

    class UsableItem : Item

    {

        public string Effect { get; set; }

    }

    class Staff : Weapon

    {

        public int IntRestr { get; set; }

    }

    class Sword : Weapon

    {

        public int StrRestr { get; set; }

    }

    public class Program

    {

        public static void Main(string[] args)

        {

            List<Item> inventory = new List<Item>();

            inventory.Add(new UsableItem() { Weight = 1, Effect = "Stun" });

            inventory.Add(new UsableItem() { Weight = 1, Effect = "Heal" });

            inventory.Add(new Staff() { Class = "Mage", Damage = 25, IntRestr = 10, Weight = 3 });

            inventory.Add(new Sword() { Class = "Warrior", Damage = 40, StrRestr = 10, Weight = 4 });

            inventory.Add(new Sword() { Class = "Warrior", Damage = 55, StrRestr = 15, Weight = 5 });

            inventory.Add(new Sword() { Class = "Warrior", Damage = 35, StrRestr = 5, Weight = 2 });

            inventory.Add(new Staff() { Class = "Mage", Damage = 30, IntRestr = 12, Weight = 2 });

​

            foreach (UsableItem i in inventory.OfType<UsableItem>())

                Console.WriteLine("Effect: {0} Weitght: {1}", i.Effect, i.Weight);

            foreach (Staff i in inventory.OfType<Staff>())

                Console.WriteLine("Class: {0} Damage: {1} Intelligence Restriction: {2} Weitght: {3}", i.Class, i.Damage, i.IntRestr, i.Weight);

            foreach (Sword i in inventory.OfType<Sword>())

                Console.WriteLine("Class: {0} Damage: {1} Strength Restriction: {2} Weitght: {3}", i.Class, i.Damage, i.StrRestr, i.Weight);

        }

    }

}

​