ToolBar of earlier page is displaying.

Hello All,
I m going through a strange problem.I have implemented an Navigation.pushAsych method to navigate from one page to other page.
It's navigating correctly but ToolBar of earlier page is displaying instead of current page.
below is my code:
`public Login ()
{

        if (ParseUser.CurrentUser != null) {
            Navigation.PushAsync (new LayoutRelative ());
        } else {
            InitializeComponent ();
        }
    }`

please help me to get rid of this problem.
Thanks in advance