Semi.Avalonia/demo/Semi.Avalonia.Demo/Pages/ButtonSpinnerDemo.axaml

<UserControl
    x:Class="Semi.Avalonia.Demo.Pages.ButtonSpinnerDemo"
    xmlns="https://github.com/avaloniaui"
    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"
    d:DesignHeight="450"
    d:DesignWidth="800"
    mc:Ignorable="d">
    <StackPanel
        Margin="20"
        HorizontalAlignment="Left"
        Spacing="20">
        <ButtonSpinner
            Height="30"
            AllowSpin="{Binding #allowSpinCheck.IsChecked}"
            BorderThickness="1"
            ShowButtonSpinner="{Binding #showSpinCheck.IsChecked}"
            Spin="OnSpin">
            <TextBlock
                HorizontalAlignment="Center"
                VerticalAlignment="Center"
                Background="Gray"
                Text="Everest" />
        </ButtonSpinner>
        <ButtonSpinner
            Height="30"
            AllowSpin="{Binding #allowSpinCheck.IsChecked}"
            BorderThickness="1"
            ButtonSpinnerLocation="Left"
            ShowButtonSpinner="{Binding #showSpinCheck.IsChecked}"
            Spin="OnSpin">
            <TextBlock
                HorizontalAlignment="Center"
                VerticalAlignment="Center"
                Background="Gray"
                Text="Everest" />
        </ButtonSpinner>
    </StackPanel>
</UserControl>