说明： 你看到了如何用C#进行编程的一个完整过程。这个例子虽然很简单，但是麻雀虽小，五脏俱全，理解其中的原理后，就可以大显身手，充分发挥C#的强大功能了。 (you see how to use the C# programming of a complete process. Although this example is simple, but Sparrow small, perfectly formed, understanding the principles, will be able to flourish and play a full C# functions of the powerful.)
