Avalonia/samples/IntegrationTestApp/ShowWindowTest.axaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:integrationTestApp="clr-namespace:IntegrationTestApp"
        x:Class="IntegrationTestApp.ShowWindowTest"
        Name="SecondaryWindow"
        x:DataType="Window"
        Title="Show Window Test">
  <integrationTestApp:MeasureBorder Name="MyBorder">
    <Grid ColumnDefinitions="Auto,Auto" RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto">
      <Label Grid.Column="0" Grid.Row="1">Client Size</Label>
      <TextBox Name="CurrentClientSize" Grid.Column="1" Grid.Row="1" IsReadOnly="True"
               Text="{Binding ClientSize, Mode=OneWay}" />

      <Label Grid.Column="0" Grid.Row="2">Frame Size</Label>
      <TextBox Name="CurrentFrameSize" Grid.Column="1" Grid.Row="2" IsReadOnly="True"
               Text="{Binding FrameSize, Mode=OneWay}" />

      <Label Grid.Column="0" Grid.Row="3">Position</Label>
      <TextBox Name="CurrentPosition" Grid.Column="1" Grid.Row="3" IsReadOnly="True" />

      <Label Grid.Column="0" Grid.Row="4">Owner Rect</Label>
      <TextBox Name="CurrentOwnerRect" Grid.Column="1" Grid.Row="4" IsReadOnly="True" />

      <Label Grid.Column="0" Grid.Row="5">Screen Rect</Label>
      <TextBox Name="CurrentScreenRect" Grid.Column="1" Grid.Row="5" IsReadOnly="True" />

      <Label Grid.Column="0" Grid.Row="6">Scaling</Label>
      <TextBox Name="CurrentScaling" Grid.Column="1" Grid.Row="6" IsReadOnly="True" />

      <Label Grid.Column="0" Grid.Row="7">WindowState</Label>
      <ComboBox Name="CurrentWindowState" Grid.Column="1" Grid.Row="7" SelectedIndex="{Binding WindowState}">
        <ComboBoxItem Name="WindowStateNormal">Normal</ComboBoxItem>
        <ComboBoxItem Name="WindowStateMinimized">Minimized</ComboBoxItem>
        <ComboBoxItem Name="WindowStateMaximized">Maximized</ComboBoxItem>
        <ComboBoxItem Name="WindowStateFullScreen">FullScreen</ComboBoxItem>
      </ComboBox>

      <Label Grid.Column="0" Grid.Row="8">Order (mac)</Label>
      <TextBox Name="CurrentOrder" Grid.Column="1" Grid.Row="8" IsReadOnly="True" />
      
      <Label Grid.Row="9" Content="MeasuredWith:" />
      <TextBlock Grid.Column="1" Grid.Row="9" Name="CurrentMeasuredWithText" Text="{Binding #MyBorder.MeasuredWith}" />

      <Button Name="HideButton" Grid.Row="10" Command="{Binding $parent[Window].Hide}">Hide</Button>
      
    </Grid>
  </integrationTestApp:MeasureBorder>
</Window>