DRAG DROP
You are developing a Universal Windows Platform (UWP) app that will take photos. The app will be used
across Windows 10 device families.
You need to ensure that when the app runs on a phone, the app can use the built-in features of the phone.
How should you complete the code? To answer, drag the appropriate code elements to the correct targets.Each element may be used once, more than once, or not at all. You may need to drag the split bar between
panes or scroll to view content.
Select and Place:
Answer: 
Explanation:
Box 1, box 2:
Example code:
Windows.Foundation.Metadata.ApiInformation.IsTypePresent(“Windows.Phone.UI.Input.HardwareButtons”);
if (isHardwareButtonsAPIPresent)
{
Windows.Phone.UI.Input.HardwareButtons.CameraPressed +=
HardwareButtons_CameraPressed;
}
Box 3:
Example: Making the Back button appear requires just one line of code:
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
AppViewBackButtonVisibility.Visible;https://msdn.microsoft.com/en-us/library/windows/apps/dn894631.aspx