MainWindow.xaml

<Window x:Class="LegoLogger.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:LegoLogger"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="550">
    <Grid Loaded="Grid_Loaded">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="183*"/>
            <ColumnDefinition Width="184*"/>
            <ColumnDefinition Width="175*"/>
        </Grid.ColumnDefinitions>
        
        <Button x:Name="StartLoggingButton" Content="Start Logging" HorizontalAlignment="Center" Margin="14,124,11,259" VerticalAlignment="Center" Width="150" Click="StartLoggingButton_Click" Height="40" FontSize="24" Grid.Column="2"/>
        <Button x:Name="StopLoggingButton" Content="Stop Logging" HorizontalAlignment="Center" Margin="14,169,11,214" VerticalAlignment="Center" Width="150" Click="StopLoggingButton_Click" Height="40" FontSize="24" Grid.Column="2"/>
        <Button x:Name="WriteLogButton" Content="Write Log" HorizontalAlignment="Center" Margin="14,214,11,169" VerticalAlignment="Center" Width="150" Click="WriteLogButton_Click" Height="40" Grid.Column="2" FontSize="24"/>
        <Button x:Name="ClearLogButton" Content="Clear Log" HorizontalAlignment="Center" Margin="14,259,11,124" VerticalAlignment="Center" Width="150" Click="ClearLogButton_Click" Height="40" Grid.Column="2" FontSize="24"/>
        <TextBlock x:Name="textBlock1" HorizontalAlignment="Center" Margin="12,10,12,0" TextWrapping="Wrap" VerticalAlignment="Top" Grid.ColumnSpan="3" Height="56" Width="518" FontSize="21.333"><Run Text="Th"/><Run Text="is"/><Run Text=" program collect"/><Run Text="s the"/><Run Text=" values of "/><Run Text="the "/><Run Text="sensors. "/><Run Text="The logged data is written"/><Run Text=" to C:\EV3\Log.csv"/></TextBlock>
        <TextBlock x:Name="textBlock" HorizontalAlignment="Left" Margin="10,388,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Grid.ColumnSpan="3" Height="25" Width="497" FontSize="16"><Run Text="LEGO EV3 Data Logger V"/><Run Text="3"/><Run Text=".0"/><LineBreak/></TextBlock>
        <Label x:Name="GUILetterCount" Content="0" HorizontalAlignment="Left" Margin="20,82,0,0" VerticalAlignment="Top" FontSize="18.667" Width="50" Height="33" Grid.Column="1"/>
        <Label x:Name="label" Content="Current Letter Count :" HorizontalAlignment="Left" Height="33" Margin="10,82,0,0" VerticalAlignment="Top" Width="193" FontSize="18.667" Grid.ColumnSpan="2"/>
        <Label x:Name="label_Copy" Content="X :" HorizontalAlignment="Left" Height="33" Margin="15,308,0,0" VerticalAlignment="Top" Width="30" FontSize="18.667" Grid.Column="2"/>
        <Label x:Name="label_Copy1" Content="Y :" HorizontalAlignment="Left" Height="33" Margin="101,308,0,0" VerticalAlignment="Top" Width="30" FontSize="18.667" Grid.Column="2"/>
        <Label x:Name="label_Copy2" Content="Pen Pressed :" HorizontalAlignment="Left" Height="33" Margin="13,341,0,0" VerticalAlignment="Top" Width="123" FontSize="18.667" Grid.Column="2"/>
        <Label x:Name="GUIxCoordinate" Content="0" HorizontalAlignment="Left" Margin="50,308,0,0" VerticalAlignment="Top" Grid.Column="2" FontSize="18.667" Width="50" Height="33"/>
        <Label x:Name="GUIyCoordinate" Content="0" HorizontalAlignment="Left" Margin="136,308,-11,0" VerticalAlignment="Top" Grid.Column="2" FontSize="18.667" Width="50" Height="33"/>
        <Label x:Name="GUIIsWriting" Content="0" HorizontalAlignment="Left" Margin="136,341,0,0" VerticalAlignment="Top" FontSize="18.667" Width="31" Height="33" Grid.Column="2"/>
        <Rectangle Grid.ColumnSpan="2" Fill="#FFF4F4F5" HorizontalAlignment="Left" Height="256" Margin="10,122,0,0" Stroke="Black" VerticalAlignment="Top" Width="357"/>
        <Line x:Name="GUICursorV" HorizontalAlignment="Left" VerticalAlignment="Top" Stroke="Blue"
          X1="0"  X2="20" Y1="10" Y2="10" Height="254" Margin="12,124,0,0" Width="355" Grid.ColumnSpan="2" />
        <Line x:Name="GUICursorH" HorizontalAlignment="Right" VerticalAlignment="Top" Stroke="Blue"
          X1="10"  X2="10" Y1="0" Y2="20" Height="254" Margin="12,124,0,0" Width="355" Grid.ColumnSpan="2" />
    </Grid>
</Window>