This constructs a new instance of the delegate type using the constructor MyDelegate (object, IntPtr).

通过使用MyDelegate (object, IntPtr)构造器，就构建了一个委托类型的新实例。

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Whenever a new set of argument types or return value type is needed, a new delegate type must be declared.

当需要一组新的引数型别或传回值型别时，必须宣告一个新的传回型别。

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You can use the delegate type to declare a variable that can refer to any method with the same signature as the delegate.

可以使用委托类型来声明一个变量，该变量可以引用与委托签名相同的所有方法。

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