using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        List<Product> products = Product.GetSampleProductsList();

        Predicate<Product> test = delegate(Product p) { return p.Price > 10m; };

List<Product> matches = products.FindAll(test);

Action<Product> print = Console.WriteLine;

matches.ForEach(print);

    }

}

​

public class Product

{

    //no setters

    //a lot of code to make simple properties

    private readonly string name;

    public string Name { get { return name; } }

    private decimal price;

    public decimal Price { get { return price; } }

    public Product(string name, decimal price)

    {

        this.name = name;

        this.price = price;

    }

public static ArrayList GetSampleProducts() //arrayList doesn't know what is inside. You can add string.

{

    ArrayList list = new ArrayList();

    list.Add(new Product("West Side Story", 9.99m));

    list.Add(new Product("Assassins", 14.99m));

    list.Add(new Product("Frogs", 13.99m));

    list.Add(new Product("Sweeney Todd", 10.99m));

    return list;

}

​

public static List<Product> GetSampleProductsList() //arrayList doesn't know what is inside. You can add string.

{

    List<Product> list = new List<Product>();

    list.Add(new Product("West Side Story", 9.99m));

    list.Add(new Product("Assassins", 14.99m));

    list.Add(new Product("Frogs", 13.99m));

    list.Add(new Product("Sweeney Todd", 10.99m));

    return list;

}

public override string ToString()

{

    return string.Format("{0}: {1}", name, price);

}

}

​

class ProductNameComparer : IComparer

{

    public int Compare(object x, object y)

    {

        var p1 = (Product)x;

        var p2 = (Product)y;

        return p1.Name.CompareTo(p2.Name);

    }

}

​

class ProductNameComparer2 : IComparer<Product>

{

public int Compare(Product x, Product y)

{

return x.Name.CompareTo(y.Name);

}

}