MainPage.xaml

<Page
    x:Class="Sensor.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Sensor"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" Unloaded="Page_Unloaded">

  <Border Padding="10">
    <StackPanel>
      <TextBlock Text="D8:" Margin="0,20,0,0"/>
      <TextBlock FontSize="40" FontWeight="Bold" Name="D8"/>
      <TextBlock Text="A0:" Margin="0,20,0,0"/>
      <TextBlock FontSize="40" FontWeight="Bold" Name="A0"/>
      <TextBlock Text="Light:" Margin="0,20,0,0"/>
      <TextBlock FontSize="40" FontWeight="Bold" Name="Light"/>
      <CheckBox Name="OutputToFile" Click="OutputToFile_Click">Output values to file.</CheckBox>
      <TextBlock Text="Events:" Margin="0,20,0,0"/>
      <StackPanel Name="EventsPanel"/>
    </StackPanel>
  </Border>
</Page>