<Window x:Class="TestCodeCoverage.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel>
        <TextBox x:Name="One"/>
        <TextBox x:Name="Two"/>
        <Button x:Name="Add" Content="Add" Click="Add_Click"/>
        <TextBox x:Name="Total"/>
    </StackPanel>
</Window>
