DRAG DROP
You are developing a Universal Windows Platform (UWP) app that will provide users with the ability to assign tasks to their contacts. The app will have a button that
users click to display their contact list.
You need to develop the click event handler for the button.
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:
Example:
private async void PickAContactButton_Click(object sender, RoutedEventArgs e)
{
ContactPicker contactPicker = new ContactPicker();
Contact contact = await contactPicker.PickContactAsync();
}https://msdn.microsoft.com/en-us/library/windows/apps/mt185415.aspx