<Window x:Class="WPF_9_MessageBox.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"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition />
        </Grid.RowDefinitions>

        <Button Name="FireButton" Width="100" Height="40" Click="FireButton_OnClick">Fire </Button>
        <TextBlock Grid.Row="1" Name="InfoTextBlock" FontSize="16" VerticalAlignment="Center"
                   HorizontalAlignment="Center" />
    </Grid>
</Window>