C#编程之自动实现的属性

在 C# 3.0 及更高版本，当属性访问器中不需要任何其他逻辑时，自动实现的属性会使属性声明更加简洁。它们还允许客户端代码创建对象。当你声明以下示例中所示的属性时，编译器将创建仅可以通过该属性的
get 和 set 访问器访问的专用、匿名支持字段。

下列示例演示一个简单的类，它具有某些自动实现的属性：

// This class is mutable. Its data can be modified from
// outside the class.
class Customer
{
    // Auto-Impl Properties for trivial get and set
    public double TotalPurchases { get; set; }
    public string Name { get; set; }
    public int CustomerID { get; set; }

    // Constructor
    public Customer(double purchases, string name, int ID)
    {
        TotalPurchases = purchases;
        Name = name;
        CustomerID = ID;
    }
    // Methods
    public string GetContactInfo() {return "ContactInfo";}
    public string GetTransactionHistory() {return "History";}

    // .. Additional methods, events, etc.
}

class Program
{
    static void Main()
    {
        // Intialize a new object.
        Customer cust1 = new Customer ( 4987.63, "Northwind",90108 );

        //Modify a property
        cust1.TotalPurchases += 499.99;
    }
}