Avalonia/samples/ControlCatalog/Pages/DialogsPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.DialogsPage">
  <StackPanel Orientation="Vertical" Spacing="4" Margin="4">
      <CheckBox Name="UseFilters">Use filters</CheckBox>
      <Button Name="OpenFile">_Open File</Button>
      <Button Name="OpenMultipleFiles">Open _Multiple File</Button>
      <Button Name="SaveFile">_Save File</Button>
      <Button Name="SelectFolder">Select Fo_lder</Button>
      <Button Name="OpenBoth">Select _Both</Button>

      <TextBlock x:Name="PickerLastResultsVisible"
                 Classes="h2"
                 IsVisible="False"
                 Text="Last picker results:" />
      <ItemsPresenter x:Name="PickerLastResults" />

      <TextBlock Margin="0, 8, 0, 0"
                 Classes="h1"
                 Text="Window dialogs" />
      <Button Name="DecoratedWindow">Decorated _window</Button>
      <Button Name="DecoratedWindowDialog">Decorated w_indow (dialog)</Button>
      <Button Name="Dialog">_Dialog</Button>
      <Button Name="DialogNoTaskbar">Dialog (_No taskbar icon)</Button>
      <Button Name="OwnedWindow">Own_ed window</Button>
      <Button Name="OwnedWindowNoTaskbar">Owned window (No tas_kbar icon)</Button>

  </StackPanel>
</UserControl>