<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Saludo" Height="200" Width="300">
    <Grid>
    <Label Name="etSaludo" Content="etiqueta" FontSize="14"
           Height="28" Margin="80,31,0,0" Width="118"
           HorizontalAlignment="Left" VerticalAlignment="Top"
           HorizontalContentAlignment="Center"
           VerticalContentAlignment="Center" />
    <Button Name="btSaludo" Content="Haga clic aquí"
            Height="23" Width="118" Margin="80,96,0,0"
            HorizontalAlignment="Left" VerticalAlignment="Top"
            Click="btSaludo_Click" />
  </Grid>
</Window>
