How do I implement Back Button in xamarin android application?

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C#

Android

Xamarin

Hi All,

I want to implement Mobile Back Button Functionality in my Xamarin Android Application.
Basically I had done following code in all the pages:-

public override bool OnKeyDown(Keycode keyCode, KeyEvent e)
{
    if (e.KeyCode == Keycode.Back) {
    	base.OnBackPressed ();
    	// Transition your Fragments here
    } 

    return base.OnKeyDown(keyCode, e);
}

Now the issue which i am facing is, i had opened multiple pages in following sequence :-
Home Page -> Listing -> Detail -> Listing -> Detail etc.
Now on pressing back button , it traverse back to all of the pages in following order :-
Detail -> Listing -> Again Detail(should not to come) -> Listing(should not to come) -> Home -> Exit

What i need is Detail -> Listing -> Home -> Exit only.

I had tried with Finish() too but it doesn't work.
Can anyone help me out?

Thanks in Advance.