类成员初始化与构造函数执行的顺序 转自:http://www.cnblogs.com/anderslly/archive/2008/07/12/why-do-initializers-run-in-the-opposite-order-as-constructors.html

看看下面这段代码，你觉得它会输出什么呢？

    class Foo

    {

        public Foo(string s)

        {

            Console.WriteLine("Foo constructor: {0}", s);

        }

        public void Bar(){}

    }

    class Base

    {

        readonly Foo baseFoo = new Foo("Base initializer");

        public Base()

        {

            Console.WriteLine("Base constructor");

        }

    }

    class Derived : Base

    {

        readonly Foo derivedFoo = new Foo("Derived initializer.");

        public Derived()

        {

            Console.WriteLine("Derived constructor");

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            new Derived();

        }

    }

总结,类成员的初始化要先于类的构造器执行. 

基类的构造器先于子类的构造器的执行.