Return one of two possible objects of different types sharing a method

Question

I have 2 classes:

public class Articles
{
    private string name;

    public Articles(string name)
    {
        this.name = name;
    }

    public void O         


        

Answer 1

How about something like this:

public interface IHasOutput
{
    void Output();
}

public class Articles : IHasOutput

public class Questionnaire : IHasOutput

and then:

public static IHasOutput Choose...

You can of course call your interface anything you'd like, other than IHasOutput, I just don't know what to call it. This is what interfaces are for. Two different concrete implementations that share a common interface. Now when you call it you can do this:

var entity = MyClass.Choose(1, "MyName");
entity.Output();

and it doesn't matter what concrete implementation is returned. You know it implements a common interface.