c# - Android no effect Outline Color for Frame -

i use xamarin forms. use control frame. https://developer.xamarin.com/api/type/xamarin.forms.frame/

i set outlinecolor = color.white, on uwp works, on android no effect outline color frame. how can solve problem?

my code:

    frame myframe = new frame {     content = logoimage,     outlinecolor = color.white,     verticaloptions = layoutoptions.fill,     horizontaloptions = layoutoptions.fill  }