Main.axaml

<Grid
  xmlns="https://github.com/avaloniaui"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Grid>
        <StackPanel Margin="10,10,-10,0" HorizontalAlignment="Center" VerticalAlignment="Center">
            <StackPanel Orientation="Horizontal">
                <StackPanel>
                    <TextBlock Text="Default Button" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <Button Content="Enabled"/>
                    <Button Content="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel Margin="20,0">
                    <TextBlock Text="Toggle Button" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <ToggleButton Content="Enabled"/>
                    <ToggleButton Content="Checked" IsChecked="True" Margin="0,5,0,0"/>
                    <ToggleButton Content="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                    <ToggleButton Content="Checked" IsChecked="True" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel>
                    <TextBlock Text="Toggle Switch" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <ToggleSwitch Content="Enabled"/>
                    <ToggleSwitch Content="Checked" IsChecked="True" Margin="0,5,0,0"/>
                    <ToggleSwitch Content="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                    <ToggleSwitch Content="Checked" IsChecked="True" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel Margin="20,0">
                    <TextBlock Text="CheckBox" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <CheckBox Content="Enabled"/>
                    <CheckBox Content="Checked" IsChecked="True" Margin="0,5,0,0"/>
                    <CheckBox Content="3-State" IsChecked="{x:Null}" IsThreeState="True" Margin="0,5,0,0"/>
                    <CheckBox Content="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                    <CheckBox Content="Checked" IsChecked="True" IsEnabled="False" Margin="0,5,0,0"/>
                    <CheckBox Content="3-State" IsChecked="{x:Null}" IsThreeState="True" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel Margin="20,0">
                    <TextBlock Text="RadioButton" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <StackPanel>
                        <RadioButton Content="Enabled"/>
                        <RadioButton Content="Checked" IsChecked="True" Margin="0,5,0,0"/>
                    </StackPanel>
                    <StackPanel>
                        <RadioButton Content="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                        <RadioButton Content="Checked" IsChecked="True" IsEnabled="False" Margin="0,5,0,0"/>
                    </StackPanel>
                </StackPanel>
            </StackPanel>
            <StackPanel Orientation="Horizontal" Margin="0,20,0,0">
                <StackPanel>
                    <TextBlock Text="TextBox" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <TextBox Text="Enabled"/>
                    <TextBox Watermark="Placeholder" Margin="0,5,0,0"/>
                    <TextBox Text="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel Margin="20,0">
                    <TextBlock Text="PasswordBox" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <TextBox PasswordChar="*" Text="Enabled"/>
                    <TextBox PasswordChar="*" Watermark="Placeholder" Margin="0,5,0,0"/>
                    <TextBox PasswordChar="*" Text="Disabled" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel>
                    <TextBlock Text="Slider" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <Slider Value="0" MinWidth="120"/>
                    <Slider Value="1" TickPlacement="Outside" Margin="0,5,0,0"/>
                    <Slider Value="2" IsDirectionReversed="True" TickPlacement="BottomRight" Margin="0,5,0,0"/>
                    <Slider Value="5" IsEnabled="False" Margin="0,5,0,0"/>
                </StackPanel>
                <StackPanel Margin="20,0">
                    <TextBlock Text="ListBox" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <ListBox BorderThickness="1">
                        <ListBoxItem Content="Unselected"/>
                        <ListBoxItem Content="Selected"/>
                        <ListBoxItem Content="Disabled" IsEnabled="False"/>
                    </ListBox>
                </StackPanel>
                <StackPanel>
                    <TextBlock Text="TreeView" FontSize="18" TextAlignment="Center" Margin="0,0,0,10"/>
                    <TreeView BorderThickness="1">
                        <TreeViewItem Header="Expanded" IsExpanded="True">
                            <TreeViewItem Header="Child"/>
                        </TreeViewItem>
                        <TreeViewItem Header="Collapsed">
                            <TreeViewItem Header="Child"/>
                        </TreeViewItem>
                        <TreeViewItem Header="Disabled" IsEnabled="False">
                            <TreeViewItem Header="Child"/>
                        </TreeViewItem>
                    </TreeView>
                </StackPanel>
            </StackPanel>
        </StackPanel>
    </Grid>
</Grid>