wpf6a.xaml.cs

<Window x:Class="Katas.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:Katas"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <Style x:Key="Underlined" TargetType="TextBlock">
            <Setter Property="TextDecorations" Value="Underline"/>
            <Setter Property="FontSize" Value="36"/>
        </Style>
        <Style x:Key="BlueUnderlined" TargetType="TextBlock" BasedOn="{StaticResource Underlined}">
            <Setter Property="Foreground" Value="Blue"/>
        </Style>
        <Style x:Key="GreenUnderlined" TargetType="TextBlock" BasedOn="{StaticResource Underlined}">
            <Setter Property="Foreground" Value="Green"/>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <TextBlock Style="{StaticResource BlueUnderlined}" Text="1" Grid.Row="0"/>
        <TextBlock Style="{StaticResource BlueUnderlined}" Text="2" Grid.Row="1"/>
        <TextBlock Style="{StaticResource GreenUnderlined}" Text="3" Grid.Row="2"/>
    </Grid>
</Window>