using System;

using System.Collections.Generic;

using System.Linq;

​

namespace Test

{

​

    public class Program

    {

        public static void Main(string[] args)

        {

            StockExchange stockExchange = new StockExchange();

            Product cheapest = stockExchange.GetCheapestProduct();

            decimal avarage = stockExchange.GetAvaragePrice();

​

            Console.WriteLine("The cheapest product in the list is " + cheapest.Name + 

                " and is " +  (avarage-cheapest.Price).ToString("0.##") + " cheaper than the average price of all the products.");

​

            Console.ReadLine();

        }

    }

​

    public class Product

    {

        public long Id { get; set; }

        public string Name { get; set; }

        public decimal Price { get; set; }

​

        public Product()

        {

        }

​

        public Product(string name, decimal price)

        {

            Name = name;

            Price = price;

        }

    }

​

​

    public class StockExchange

    {

        private List<Product> products = new List<Product> {

                new Product {Name = "Product 1", Price = 200},

                new Product {Name = "Product 2", Price = 50},

                new Product {Name = "Product 3", Price = 100},

        };

​

        public Product GetCheapestProduct()

        {

            return products.OrderBy(p => p.Price).First();

        }

​

        public decimal GetAvaragePrice()

        {

             return (from prod in products select prod.Price).Average();

        }

    }

​

}

​