Avalonia/samples/ControlCatalog/Pages/ButtonsPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.ButtonsPage">

  <UserControl.Resources>

    <MenuFlyout x:Key="SharedMenuFlyout"
                Placement="Bottom">
      <MenuItem Header="Item 1">
        <MenuItem Header="Subitem 1" />
        <MenuItem Header="Subitem 2" />
        <MenuItem Header="Subitem 3" />
      </MenuItem>
      <MenuItem Header="Item 2"
                InputGesture="Ctrl+A" />
      <MenuItem Header="Item 3" />
    </MenuFlyout>

  </UserControl.Resources>
      
  <UserControl.Styles >

    <Style Selector="Border.header-border">
      <Setter Property="Background">
        <Setter.Value>
          <SolidColorBrush Color="Gray" Opacity="0.5" />
        </Setter.Value>
      </Setter>
      <Setter Property="BorderBrush" Value="Gray" />
      <Setter Property="BorderThickness" Value="0.5" />
      <Setter Property="CornerRadius" Value="5,5,0,0" />
      <Setter Property="MaxWidth" Value="450" />
      <Setter Property="Padding" Value="10" />
    </Style>
    
    <Style Selector="TextBlock.header">
      <Setter Property="FontSize" Value="18" />
      <Setter Property="FontWeight" Value="Bold" />
    </Style>

    <Style Selector="Border.thin">
      <Setter Property="BorderBrush" Value="Gray" />
      <Setter Property="BorderThickness" Value="0.5" />
      <Setter Property="CornerRadius" Value="0,0,5,5" />
      <Setter Property="Margin" Value="0,0,0,15" />
    </Style>

  </UserControl.Styles>

  <!-- Styles and overall page design based on AcrylicPage -->

  <StackPanel Orientation="Vertical"
              Width="450">

    <!-- Button -->
    <Border Classes="header-border">
      <StackPanel Orientation="Vertical"
                  Spacing="4">
        <TextBlock Text="Button" Classes="header" />
        <TextBlock TextWrapping="Wrap">A standard button control</TextBlock>
      </StackPanel>
    </Border>

    <Border Classes="thin"
            Padding="15">
      <StackPanel Orientation="Horizontal"
                  HorizontalAlignment="Center"
                  Spacing="10">
        <StackPanel Orientation="Vertical"
                    Spacing="8"
                    Width="200">
          <Button>Standard _XAML Button</Button>
          <Button Foreground="White">Foreground</Button>
          <Button Background="{DynamicResource SystemAccentColor}">Background</Button>
          <Button IsEnabled="False">Disabled</Button>
          <Button Content="Re-themed">
            <Button.Styles>
              <Style>
                <Style.Resources>
                  <SolidColorBrush x:Key="ThemeBorderMidBrush">Red</SolidColorBrush>
                  <SolidColorBrush x:Key="ThemeControlHighBrush">DarkRed</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonBorderBrush">Red</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonBackground">DarkRed</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonBackgroundPointerOver">Red</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonBackgroundPressed">OrangeRed</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonForeground">White</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonForegroundPointerOver">Black</SolidColorBrush>
                  <SolidColorBrush x:Key="ButtonForegroundPressed">Black</SolidColorBrush>
                </Style.Resources>
              </Style>
            </Button.Styles>
          </Button>
        </StackPanel>

        <StackPanel Orientation="Vertical"
                    Spacing="8"
                    Width="200">
          <Button BorderThickness="0">No Border</Button>
          <Button BorderBrush="{DynamicResource SystemAccentColor}">Border Color</Button>
          <Button BorderBrush="{DynamicResource SystemAccentColor}"
                  BorderThickness="4">Thick Border</Button>
          <Button BorderBrush="{DynamicResource SystemAccentColor}"
                  BorderThickness="4"
                  IsEnabled="False">Disabled</Button>
          <Button BorderBrush="{DynamicResource SystemAccentColor}"
                  KeyboardNavigation.IsTabStop="False">IsTabStop=False</Button>
        </StackPanel>
      </StackPanel>
    </Border>

    <!-- ToggleButton -->
    <Border Classes="header-border">
      <StackPanel Orientation="Vertical"
                  Spacing="4">
        <TextBlock Text="ToggleButton"
                   Classes="header" />
        <TextBlock TextWrapping="Wrap">A button control with multiple states: checked, unchecked or indeterminate.</TextBlock>
      </StackPanel>
    </Border>

    <Border Classes="thin"
            Padding="15">
      <StackPanel Orientation="Vertical"
                  Spacing="8">
        <ToggleButton Content="Toggle Button" />
      </StackPanel>
    </Border>

    <!-- RepeatButton -->
    <Border Classes="header-border">
      <StackPanel Orientation="Vertical"
                  Spacing="4">
        <TextBlock Text="RepeatButton"
                   Classes="header" />
        <TextBlock TextWrapping="Wrap">A button control that raises its Click event repeatedly when it is pressed and held.</TextBlock>
      </StackPanel>
    </Border>

    <Border Classes="thin"
            Padding="15">
      <StackPanel Orientation="Vertical"
                  Spacing="8">
        <RepeatButton Name="RepeatButton">
          <TextBlock Name="RepeatButtonTextBlock"
                     Text="Repeat Button: 0" />
        </RepeatButton>
      </StackPanel>
    </Border>

    <!-- DropDownButton -->
    <Border Classes="header-border">
      <StackPanel Orientation="Vertical"
                  Spacing="4">
        <TextBlock Text="DropDownButton"
                   Classes="header" />
        <TextBlock TextWrapping="Wrap">A button with an added drop-down chevron to visually indicate it has a flyout with additional actions.</TextBlock>
      </StackPanel>
    </Border>

    <Border Classes="thin"
            Padding="15">
      <StackPanel Orientation="Vertical"
                  Spacing="8">
        <DropDownButton Flyout="{StaticResource SharedMenuFlyout}">
          <TextBlock Text="Drop Down Button" />
        </DropDownButton>
        <DropDownButton Padding="0,0,8,0">
          <Border Background="Teal"
                  HorizontalAlignment="Stretch"
                  VerticalAlignment="Stretch"
                  Height="32"
                  Width="32" />
        </DropDownButton>
        <DropDownButton IsEnabled="False">Disabled</DropDownButton>
        <DropDownButton />
      </StackPanel>
    </Border>

    <!-- SplitButton -->
    <Border Classes="header-border">
      <StackPanel Orientation="Vertical"
                  Spacing="4">
        <TextBlock Text="SplitButton"
                   Classes="header" />
        <TextBlock TextWrapping="Wrap">A button with primary and secondary parts that can each be pressed separately. The primary part behaves like a Button and the secondary part opens a flyout.</TextBlock>
      </StackPanel>
    </Border>

    <Border Classes="thin"
            Padding="15">
      <StackPanel Orientation="Vertical"
                  Spacing="8">
        <SplitButton Flyout="{StaticResource SharedMenuFlyout}">
          <TextBlock Text="Content" />
        </SplitButton>
        <SplitButton IsEnabled="False"
                     Flyout="{StaticResource SharedMenuFlyout}">
          <TextBlock Text="Disabled" />
        </SplitButton>
        <SplitButton Flyout="{StaticResource SharedMenuFlyout}"
                     Content="Re-themed"
                     Foreground="White">
          <SplitButton.Styles>
            <Style>
              <Style.Resources>
                <x:Double x:Key="SplitButtonSeparatorWidth">1.5</x:Double>
                <Thickness x:Key="SplitButtonBorderThemeThickness">2</Thickness>
                <SolidColorBrush x:Key="SplitButtonBorderBrush">Red</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonBorderBrushPointerOver">Red</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonBorderBrushPressed">Red</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonBackground">DarkRed</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonBackgroundPointerOver">Red</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonBackgroundPressed">OrangeRed</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonForeground">White</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonForegroundPointerOver">Black</SolidColorBrush>
                <SolidColorBrush x:Key="SplitButtonForegroundPressed">Black</SolidColorBrush>
              </Style.Resources>
            </Style>
          </SplitButton.Styles>
        </SplitButton>
      </StackPanel>
    </Border>

    <!-- ToggleSplitButton -->
    <Border Classes="header-border">
      <StackPanel Orientation="Vertical"
                  Spacing="4">
        <TextBlock Text="ToggleSplitButton"
                   Classes="header" />
        <TextBlock TextWrapping="Wrap">A button with primary and secondary parts that can each be pressed separately. The primary part behaves like a ToggleButton with two states and the secondary part opens a flyout.</TextBlock>
      </StackPanel>
    </Border>

    <Border Classes="thin"
            Padding="15">
      <StackPanel Orientation="Vertical"
                  Spacing="8">
        <ToggleSplitButton Flyout="{StaticResource SharedMenuFlyout}">
          <TextBlock Text="Content" />
        </ToggleSplitButton>
        <ToggleSplitButton IsChecked="True"
                           Flyout="{StaticResource SharedMenuFlyout}">
          <TextBlock Text="Content" />
        </ToggleSplitButton>
        <ToggleSplitButton IsChecked="True"
                           IsEnabled="False"
                           Flyout="{StaticResource SharedMenuFlyout}">
          <TextBlock Text="Disabled" />
        </ToggleSplitButton>
      </StackPanel>
    </Border>

  </StackPanel>
</UserControl>