📄 OutGridTree.Window/MainWindow.axaml
<Window 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:c="clr-namespace:OutGridTree.Window.Converters"
        xmlns:ps="clr-namespace:System.Management.Automation;assembly=System.Management.Automation"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="OutGridTree.Window.MainWindow"
        Title="Out-GridTree">
    <Window.Resources>
        <c:IsLeafConverter x:Key="isLeafConverter"/>
        <c:PsObjectPropertiesConverter x:Key="psObjectPropertiesConverter"/>
    </Window.Resources>
    <DataGrid Name="Table" AutoGenerateColumns="False" IsReadOnly="True"
              GridLinesVisibility="All" BorderThickness="1"
              SelectionMode="Extended" RowDetailsVisibilityMode="VisibleWhenSelected"
              CanUserSortColumns="True" CanUserReorderColumns="True" CanUserResizeColumns="True">
        <DataGrid.RowDetailsTemplate>
            <DataTemplate x:DataType="{x:Type ps:PSObject}">
                <TreeView ItemsSource="{Binding Properties}">
                    <TreeView.ItemTemplate>
                        <TreeDataTemplate x:DataType="{x:Type ps:PSPropertyInfo}" ItemsSource="{Binding Value, Converter={StaticResource psObjectPropertiesConverter}}">
                            <Grid ColumnDefinitions="Auto,Auto" ColumnSpacing="10">
                                <TextBlock Text="{Binding Name}" Padding="2" />
                                <TextBox Text="{Binding Value}"
                                         Grid.Column="1"
                                         IsVisible="{Binding $parent.DataContext.Value, Converter={StaticResource isLeafConverter}}"
                                         IsReadOnly="True"
                                         BorderBrush="{x:Null}"
                                         Padding="5,2" />
                            </Grid>
                        </TreeDataTemplate>
                    </TreeView.ItemTemplate>
                </TreeView>
            </DataTemplate>
        </DataGrid.RowDetailsTemplate>
    </DataGrid>
</Window>