如何强制调用一个C＃派生的方法 [英] How to force call a C# derived method

问题描述

我有一个类是由一些工具生成的，所以我不能改变它。生成的类非常简单（没有接口，没有虚拟方法）：

I have a class that is generated by some tool, therefore I can't change it. The generated class is very simple (no interface, no virtual methods):

class GeneratedFoo
{
  public void Write(string p) { /* do something */ }
}

在C＃项目中，我们想提供一种方式，使我们可以插入一个不同的MyFoo实现。所以我想让MyFoo从GeneratedFoo派生

In the C# project, we want to provide a way so that we can plug in a different implementation of MyFoo. So I'm thinking to make MyFoo derived from GeneratedFoo

class MyFoo : GeneratedFoo
{
  public new void Write(string p) { /* do different things */ }
}

我有一个CreateFoo方法，将返回一个GeneratedFoo或MyFoo类的实例。但它总是调用GeneratedFoo中的方法。

Then I have a CreateFoo method that will either return an instance of GeneratedFoo or MyFoo class. However it always calls the method in GeneratedFoo.

GeneratedFoo foo = CreateFoo(); // if this returns MyFoo,
foo.Write("1"); // it stills calls GeneratedFoo.Write

这是expceted，因为它不是一个虚方法。

This is expceted since it is not a virtual method. But I'm wondering if there is a way (a hack maybe) to make it call the derived method.

感谢，

Ian

Thanks,
Ian

推荐答案

无法使方法为virtual，no。非虚方法在编译时静态链接，不能更改。

Without being able to make the method virtual, no. A non-virtual method is statically linked at compile time and can't be changed.

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