<Window x:Class="WPFMachine.AboutWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="AboutWindow" Height="300" Width="400">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="30" />
        </Grid.RowDefinitions>
        <TextBlock x:Name="tbAbout" Margin="5" />
        <Button Content="OK" Width="30" Height="20" Grid.Row="1" Click="Button_Click" />
    </Grid>
</Window>
