从其他对象调用该方法的方法

Question

I was wondering if it's possible to otain such behaviour where method call of one object will call method of another object.

public class Example
{
    public void DoSomething() { /*BASICALLY NOTHING*/ }
}

public class Engine
{
    public void DoSomething() { Console.WriteLine("bleee"); }

    static void Main()
    {
        Example e = new Example();
        Engine eng = new Engine();

        e.DoSomething = eng.DoSomething;
    }
}

My Example object is exactly dummy object, but I would like to use this class as base class and build on top of it something more fancy.

So e.DoSomething() should call method from eng.DoSomething() . I can't use inheritance or pass Engine object to Example as argument.

Is it possible? How to achieve that? Is such approach used somewhere?

Answer 1

You can't do this in the way you describe, but you can do it with delegates.

public class Example
{
    public Action DoSomething {get; set;}
}

public class Engine
{
    public void DoSomething() { Console.WriteLine("bleee"); }

    static void Main()
    {
        Example e = new Example();
        Engine eng = new Engine();

        e.DoSomething = eng.DoSomething;
    }
}

Now you can say e.DoSomething() and it will call via the delegate by calling the getter and then calling the returned action.

Answer 2

Using reflection we can do the method call with same type info. But other types method is not possible. I think so.