What is Interface Duck Typing?

Question

I heard the word Interface Duck Typing, but do not understand at all what is it? So I read a wiki about this and they said:

In computer programming wi

Answer 1

About Duck Typing:

We don't need to know what the object is, but we just want to let the object do something if it can do.

Example:

Example, if here are the things that we want the following objects do.

PleaseWalk(new Dog());
PleaseRun(new Duck());
PleaseWalk(new Cup());
PleaseFly(new Man());
PleaseFly(new Bird());

And, here is the result after we request the above objects do the things.

So, we don't need to check what the object is, but we can let it do something enough. Here is the code that I have written in C#.

private void PleaseWalk(object obj)
    {
        string Method = "Walk";
        MethodInfo walkMethod = obj.GetType().GetMethod(Method, Type.EmptyTypes, null);
        if (walkMethod != null)
        {
            walkMethod.Invoke(obj, new object[] { });
        }
        else
        {
            Console.WriteLine(string.Format("I can not {0} because {1}", Method, WhoAreYou(obj)));
        }
    }

    private string WhoAreYou(object unknown)
    {
        MethodInfo whoAreYou = unknown.GetType().GetMethod("WhoAreYou", Type.EmptyTypes, null);
        return whoAreYou.Invoke(unknown, new object[] { }).ToString();
    }