Avalonia/samples/ControlCatalog/Pages/TextBlockPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.TextBlockPage">
  <StackPanel>
    <TextBlock Classes="h1">TextBlock</TextBlock>
    <TextBlock Classes="h2">A control that can display text</TextBlock>
    <StackPanel
      Orientation="Horizontal"
      Spacing="16"
      HorizontalAlignment="Center"
      Margin="0,16,0,0">
      <StackPanel.Styles>
        <Style Selector="Border">
          <Setter Property="BorderThickness" Value="1"/>
          <Setter Property="BorderBrush" Value="{DynamicResource ThemeBorderMidBrush}"/>
          <Setter Property="Padding" Value="2"/>
        </Style>
      </StackPanel.Styles>
      <Border>
        <StackPanel Width="200" Spacing="8">
          <TextBlock TextTrimming="CharacterEllipsis" Text="Lorem ipsum dolor sit amet, consectetur adipiscing elit."/>
          <TextBlock TextTrimming="WordEllipsis" Text="Lorem ipsum dolor sit amet, consectetur adipiscing elit."/>
          <TextBlock Text="Left aligned text" TextAlignment="Left" />
          <TextBlock Text="Center aligned text" TextAlignment="Center" />
          <TextBlock Text="Right aligned text" TextAlignment="Right" />
        </StackPanel>
      </Border>
      <Border>
        <StackPanel Width="200" Spacing="8">
          <TextBlock
            TextWrapping="Wrap"
            Text="Multiline TextBlock with TextWrapping.&#xD;&#xD;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est." />
        </StackPanel>
      </Border>
      <Border>
        <StackPanel Width="200" Spacing="8">
          <TextBlock Text="Custom font regular" FontWeight="Normal" FontStyle="Normal" FontFamily="avares://ControlCatalog/Assets/Fonts#Source Sans Pro"/>
          <TextBlock Text="Custom font bold" FontWeight="Bold" FontStyle="Normal" FontFamily="avares://ControlCatalog/Assets/Fonts#Source Sans Pro"/>
          <TextBlock Text="Custom font italic" FontWeight="Normal" FontStyle="Italic" FontFamily="/Assets/Fonts/SourceSansPro-Italic.ttf#Source Sans Pro"/>
          <TextBlock Text="Custom font italic bold" FontWeight="Bold" FontStyle="Italic" FontFamily="/Assets/Fonts/SourceSansPro-*.ttf#Source Sans Pro"/>
        </StackPanel>
      </Border>
    </StackPanel>
    <StackPanel
      Orientation="Horizontal"
      Spacing="16"
      HorizontalAlignment="Center"
      Margin="0,16,0,0">
      <StackPanel.Styles>
        <Style Selector="Border">
          <Setter Property="BorderThickness" Value="1"/>
          <Setter Property="BorderBrush" Value="{DynamicResource ThemeBorderMidBrush}"/>
          <Setter Property="Padding" Value="2"/>
        </Style>
      </StackPanel.Styles>
      <Border>
        <StackPanel Width="200" Spacing="8">
          <TextBlock TextDecorations="Underline" Text="Underline"/>
          <TextBlock TextDecorations="Strikethrough" Text="Strikethrough"/>
          <TextBlock TextDecorations="Overline" Text="Overline" />
          <TextBlock TextDecorations="Baseline" Text="Baseline"/>
          <TextBlock Text="Custom TextDecorations">
            <TextBlock.TextDecorations>
              <TextDecorationCollection>
                <TextDecoration
                  Location="Overline"
                  StrokeThicknessUnit="Pixel"
                  StrokeThickness="2">
                  <TextDecoration.Stroke>
                    <LinearGradientBrush StartPoint="0%,0%" EndPoint="100%,100%">
                      <LinearGradientBrush.GradientStops>
                        <GradientStop Offset="0" Color="Red"/>
                        <GradientStop Offset="1" Color="Green"/>
                      </LinearGradientBrush.GradientStops>
                    </LinearGradientBrush>
                  </TextDecoration.Stroke>
                </TextDecoration>
                <TextDecoration
                  Location="Strikethrough"
                  StrokeThicknessUnit="Pixel"
                  StrokeThickness="1">
                  <TextDecoration.Stroke>
                    <LinearGradientBrush StartPoint="0%,0%" EndPoint="100%,100%">
                      <LinearGradientBrush.GradientStops>
                        <GradientStop Offset="0" Color="Green"/>
                        <GradientStop Offset="1" Color="Blue"/>
                      </LinearGradientBrush.GradientStops>
                    </LinearGradientBrush>
                  </TextDecoration.Stroke>
                </TextDecoration>
                <TextDecoration
                  Location="Underline"
                  StrokeThicknessUnit="Pixel"
                  StrokeThickness="2">
                  <TextDecoration.Stroke>
                    <LinearGradientBrush StartPoint="0%,0%" EndPoint="100%,100%">
                      <LinearGradientBrush.GradientStops>
                        <GradientStop Offset="0" Color="Blue"/>
                        <GradientStop Offset="1" Color="Red"/>
                      </LinearGradientBrush.GradientStops>
                    </LinearGradientBrush>
                  </TextDecoration.Stroke>
                </TextDecoration>
              </TextDecorationCollection>
            </TextBlock.TextDecorations>
          </TextBlock>
        </StackPanel>
      </Border>
      <Border>
        <StackPanel Width="200" Spacing="8">
          <TextBlock Text="🏻 👌🏻"/>
          <TextBlock Text="🏼 👌🏼" />
          <TextBlock Text="🏽 👌🏽"/>
          <TextBlock Text="🏾 👌🏾"/>
          <TextBlock Text="🏿 👌🏿"/>
        </StackPanel>
      </Border>
      <Border>
        <StackPanel Width="200" Spacing="8">
          <TextBlock Text="👪 👨‍👩‍👧 👨‍👩‍👧‍👦"/>
        </StackPanel>
      </Border>
    </StackPanel>
  </StackPanel>
</UserControl>