委托

代码说明：

  C#的委托实现，，以一个建议的例子进行说明，具体代码以及注释均有。 委托实现了对方法的封装引用，适于初学者对于委托的理解(The implementation of C# is illustrated by a suggested example, with specific code and annotations. The delegate realizes the encapsulation and reference of the method, and is suitable for beginners to understand the entrustment.)