Avalonia/samples/VirtualizationDemo/Views/PlaygroundPageView.axaml

<UserControl 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"
             xmlns:vm="using:VirtualizationDemo.ViewModels"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="VirtualizationDemo.Views.PlaygroundPageView"
             x:DataType="vm:PlaygroundPageViewModel">
  <DockPanel>
    <StackPanel DockPanel.Dock="Right" Margin="8 0" Width="200">
      <DropDownButton Content="Selection" HorizontalAlignment="Stretch">
        <Button.Flyout>
          <Flyout>
            <StackPanel>
              <CheckBox IsChecked="{Binding Multiple}">Multiple</CheckBox>
              <CheckBox IsChecked="{Binding Toggle}">Toggle</CheckBox>
              <CheckBox IsChecked="{Binding AlwaysSelected}">AlwaysSelected</CheckBox>
              <CheckBox IsChecked="{Binding #list.AutoScrollToSelectedItem}">AutoScrollToSelectedItem</CheckBox>
              <CheckBox IsChecked="{Binding #list.WrapSelection}">WrapSelection</CheckBox>
            </StackPanel>
          </Flyout>
        </Button.Flyout>
      </DropDownButton>
      
      <Label>_Select Item</Label>
      <DockPanel>
        <TextBox x:Name="scrollToIndex" Text="{Binding ScrollToIndex}">
          <TextBox.InnerRightContent>
            <StackPanel Orientation="Horizontal">
              <Button DockPanel.Dock="Right"
                      Command="{Binding RandomizeScrollToIndex}"
                      ToolTip.Tip="Randomize">
                &#x27F3;
              </Button>
              <Button DockPanel.Dock="Right"
                      Command="{Binding ExecuteScrollToIndex}"
                      ToolTip.Tip="Execute">
                &#11152;
              </Button>
            </StackPanel>
          </TextBox.InnerRightContent>
        </TextBox>
      </DockPanel>

      <Label>New Item</Label>
      <TextBox Text="{Binding NewItemHeader}">
        <TextBox.InnerRightContent>
          <Button Command="{Binding AddAtSelectedIndex}"
                  ToolTip.Tip="Add at Selected Index">&#x2B;</Button>
        </TextBox.InnerRightContent>
      </TextBox>

      <Button Command="{Binding DeleteSelectedItem}" Margin="0 8 0 0">
        Delete Selected
      </Button>
    </StackPanel>
    
    <TextBlock Name="itemCount" DockPanel.Dock="Bottom"/>
    
    <ListBox Name="list"
             ItemsSource="{Binding Items}"
             DisplayMemberBinding="{Binding Header}"
             Selection="{Binding Selection}"
             SelectionMode="{Binding SelectionMode}"/>
  </DockPanel>
</UserControl>