ListView with Checkbox - not working

ListView.cs

using Avalonia.Controls;
using Avalonia.Markup.Xaml;
using System.Collections.Generic;
using System.Linq;
using Avalonia.Data;
using Avalonia.Controls.Templates;
using Avalonia.Controls.Primitives;
using System;

namespace Playground
{
    public class ListItem
    {
        public string Greet { get; set; }
        public string Something { get; set; }
        public bool? Done { get; set; }

        public override string ToString()
        {
            return $"{Greet} {Something} = {Done}";
        }
    }
    public class ListView : Window
    {
        public ListView()
        {
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
          
            // Let's build up the content with normal model classes;
            var modelList = new List<ListItem>()
            {
                new ListItem { Greet = "Hello", Something = "World", Done = false},
                new ListItem { Greet = "Hi", Something = "Earth", Done = true },
                new ListItem { Greet = "Howdy", Something = "Planet", Done  = false }
            };

            
            // Create a List of Dictionaries from that:
            var dictList = modelList.Select(i => i.GetType().GetProperties().ToDictionary(t => t.Name, t => t.GetValue(i))).ToList();

            // Create a base panel
            StackPanel mainStack = new StackPanel
            {
                Orientation = Orientation.Vertical
            };

            Content = mainStack;

            // Create the list;
            var listView = new ListBox
            {
            };
            // now connect the items
            listView.Items = dictList;

            mainStack.Children.Add(listView);

            
            // create a datatemplate: 
            var template = new FuncDataTemplate<Dictionary<string, object>>(x =>
            {
                var stack = new StackPanel
                {
                    Orientation = Orientation.Horizontal
                    
                };
                stack.Children.Add(new TextBlock
                    {
                        [!TextBlock.TextProperty] = new Binding("[Greet]")
                    }
                );
                stack.Children.Add(new TextBlock
                    {
                        [!TextBlock.TextProperty] = new Binding("[Something]")
                    }
                );
                stack.Children.Add(new CheckBox
                    {
                        [!ToggleButton.IsCheckedProperty] = new Binding("[Done]", BindingMode.TwoWay)
                    }
                );

            

                return stack; 
            });




            // assign it 
            listView.ItemTemplate = template;

           

        }
    }
}