How to handle the back button on Windows Phone 7

Question

On the windows phone 7 emulator, when the hardware back button is pressed, the default behaviour is for it to close your current application. I want to override this defaul

Answer 1

If you don't want the default back key behavior, set Cancel = true in the CancelEventArgs parameter in OnBackKeyPress. In my page, I've overridden the back button to close a web browser control instead of navigating back.

    protected override void OnBackKeyPress(CancelEventArgs e)
    {
        if (Browser.Visibility == Visibility.Visible)
        {
            Browser.Visibility = Visibility.Collapsed;
            e.Cancel = true;
        }
    }