1.1.1 从简单的数据类型开始

    /// <summary>/// C# 1.0 中定义的产品类型/// </summary>public class Product1{string name;public string Name { get { return name; } }decimal price;public decimal Price { get { return price; } }public Product1(string name, decimal price){this.name = name;this.price = price;}public static ArrayList GetSampleProducts(){ArrayList list = new ArrayList();list.Add(new Product1("West Side Story", 9.99m));list.Add(new Product1("Assassins", 14.99m));list.Add(new Product1("Frogs", 13.99m));list.Add(new Product1("Sweeney Todd", 10.99m));return list;}public override string ToString(){return string.Format("{0}:{1}", name, price);}}/// <summary>/// C# 2.0 中的强类型集合/// </summary>public class Product2{string name;public string Name { get { return name; } private set { name = value; } }decimal price;public decimal Price { get { return price; } private set { price = value; } }public Product2(string name, decimal price){Name = name;Price = price;}public static List<Product2> GetSampleProducts(){List<Product2> list = new List<Product2>();list.Add(new Product2("West Side Story", 9.99m));list.Add(new Product2("Assassins", 14.99m));list.Add(new Product2("Frogs", 13.99m));list.Add(new Product2("Sweeney Todd", 10.99m));return list;}public override string ToString(){return string.Format("{0}:{1}", name, price);}}/// <summary>/// C# 3.0 中自动实现的属性/// </summary>public class Product3{public string Name { get; private set; }public decimal Price { get; private set; }public Product3(string name, decimal price){Name = name;Price = price;}Product3() { }public static List<Product3> GetSampleProduct(){return new List<Product3>{new Product3{Name="West Side Story",Price=9.99m},new Product3{Name="Assassins",Price=14.99m},new Product3{Name="Frogs",Price=13.99m},new Product3{Name="Sweeney Todd",Price=10.99m}};}public override string ToString(){return string.Format("{0}:{1}", Name, Price);}}/// <summary>/// C# 4.0 命名实参带来了清晰的初始化代码/// </summary>public class Product4{readonly string name;public string Name { get { return name; } }readonly decimal price;public decimal Price { get { return price; } }public Product4(string name, decimal price){this.name = name;this.price = price;}public static List<Product4> GetSampleProduct(){return new List<Product4>{new Product4{name:"West Side Story",price:9.99m},new Product4{name:"Assassins",price:14.99m},new Product4{name:"Frogs",price:13.99m},new Product4{name:"Sweeney Todd",price:10.99m}};}public override string ToString(){return string.Format("{0}:{1}", name, price);}}