Device.OnPlatform obsolete

How can I fix the warning about Device.OnPlatform obsolete? I know it was replace by using switch, but how can I fix Icon = Device.OnPlatform("tab_feed.png",null,null)

public static void SetMainPage()
{
    Current.MainPage = new TabbedPage
    {
        Children =
        {
            new NavigationPage(new ItemsPage())
            {
                Title = "Browse",
                Icon = Device.OnPlatform("tab_feed.png",null,null)
            },
            new NavigationPage(new AboutPage())
            {
                Title = "About",
                Icon = Device.OnPlatform("tab_about.png",null,null)
            },
        }
    };
}1.