简单的用法

当你需要创建对象并立即设置几个属性时，对象初始值设定项很方便，但可用的构造函数是不够的。说你有课

public class Book
{
    public string Title { get; set; }
    public string Author { get; set; }

    // the rest of class definition
}

要使用初始化程序初始化类的新实例：

Book theBook = new Book { Title = "Don Quixote", Author = "Miguel de Cervantes" };

这相当于

Book theBook = new Book();
theBook.Title = "Don Quixote";
theBook.Author = "Miguel de Cervantes";