title: how to create custom popup window in Xamarin.Form
body: <p>In Xamarin.Forms I need to create a popup window that shows login page in popup window.</p>
  
  <p>here is my code using xlab popup control.</p>
  
  <pre><code>MainPage l = new MainPage();    
  Navigation.PushModalAsync(l); 
  PopupLayout popupLayout = new PopupLayout();
  popupLayout.Content = l.Content;
  ShowPopup(l);
  </code></pre>
  
  <p><code>MainPage</code> extends <code>ContentPage</code> and currently its working fine for login screen, but my requirement is to show it as a popup. Can anyone please help on this? Or is there any other way to do this ?</p>