How to print the current display screen xamarin.Forms (windows 8.1)

Hi
I created a app in xamarin.Forms for windows. I am displaying a list to the user and i would like to give the user the option to print the list.
I found a demo app that was build in windows 8.1 (not xamarin forms) it uses this piece of code
await Windows.Graphics.Printing.PrintManager.ShowPrintUIAsync(); But i cant get it to work properly. what would be the best way to print the current screen