mi auto rispondo per chi servisse.
nello xaml della pagina
codice:
<Page x:Class="EosDataEntry.Page1"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      mc:Ignorable="d" 
      Title="Page1" Height="134" Width="460"  >
quei tag in grassetto vanno rimossi