NmeaParser/src/SampleApp.UWP/MainPage.xaml

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

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Padding="10">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <StackPanel x:Name="gnssMonitorView" BorderBrush="Black" BorderThickness="1" Padding="5" CornerRadius="3">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="Latitude: " />
                <TextBlock Text="{Binding Latitude}" />
            </StackPanel>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="Longitude: " />
                <TextBlock Text="{Binding Longitude}" />
            </StackPanel>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="Altitude: " />
                <TextBlock Text="{Binding Altitude}" />
            </StackPanel>
        </StackPanel>

        <ComboBox Header="NMEA Device:" x:Name="nmeaDevicePicker" Grid.Row="1" Margin="0, 10" />
        <StackPanel Orientation="Horizontal" Grid.Row="2">
            <Button Content="Start" x:Name="startButton" Click="startButton_Click" />
            <Button Content="Stop" IsEnabled="False" x:Name="stopButton" Click="stopButton_Click" />
        </StackPanel>

        <TextBox x:Name="output" Grid.Row="3" AcceptsReturn="True" Header="NMEA Messages" Margin="0, 10" />
	</Grid>
</Page>