Update ListBoxPage:

- Added ItemModel
- Enable CompiledBindings
- Use DisplayMemberBinding

samples/ControlCatalog/Pages/ListBoxPage.xaml

@@ -1,5 +1,8 @@
 <UserControl xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:viewModels="clr-namespace:ControlCatalog.ViewModels"
+             x:CompileBindings="True"
+             x:DataType="viewModels:ListBoxPageViewModel"
              x:Class="ControlCatalog.Pages.ListBoxPage">
   <DockPanel>
     <DockPanel.Styles>
@@ -30,6 +33,7 @@
     </StackPanel>
     <ListBox Items="{Binding Items}"
              Selection="{Binding Selection}"
+             DisplayMemberBinding="{Binding (viewModels:ItemModel).ID, StringFormat='{}Item {0:N0}'}"
              AutoScrollToSelectedItem="{Binding AutoScrollToSelectedItem}"
              SelectionMode="{Binding SelectionMode^}"
              WrapSelection="{Binding WrapSelection}"/>

samples/ControlCatalog/ViewModels/ListBoxPageViewModel.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Reactive;
 using Avalonia.Controls;
 using Avalonia.Controls.Selection;
+using ControlCatalog.Pages;
 using MiniMvvm;
 
 namespace ControlCatalog.ViewModels
@@ -20,9 +21,9 @@ namespace ControlCatalog.ViewModels
 
         public ListBoxPageViewModel()
         {
-            Items = new ObservableCollection<string>(Enumerable.Range(1, 10000).Select(i => GenerateItem()));
+            Items = new ObservableCollection<ItemModel>(Enumerable.Range(1, 10000).Select(i => GenerateItem()));
             
-            Selection = new SelectionModel<string>();
+            Selection = new SelectionModel<ItemModel>();
             Selection.Select(1);
 
             _selectionMode = this.WhenAnyValue(
@@ -58,8 +59,8 @@ namespace ControlCatalog.ViewModels
             });
         }
 
-        public ObservableCollection<string> Items { get; }
-        public SelectionModel<string> Selection { get; }
+        public ObservableCollection<ItemModel> Items { get; }
+        public SelectionModel<ItemModel> Selection { get; }
         public IObservable<SelectionMode> SelectionMode => _selectionMode;
 
         public bool Multiple
@@ -96,6 +97,31 @@ namespace ControlCatalog.ViewModels
         public MiniCommand RemoveItemCommand { get; }
         public MiniCommand SelectRandomItemCommand { get; }
 
-        private string GenerateItem() => $"Item {_counter++.ToString()}";
+        private ItemModel GenerateItem() => new ItemModel(_counter ++);  
+    }
+
+    /// <summary>
+    /// An Item model for the <see cref="ListBoxPage"/>
+    /// </summary>
+    public class ItemModel
+    {
+        /// <summary>
+        /// Creates a new ItemModel with the given ID
+        /// </summary>
+        /// <param name="id">The ID to display</param>
+        public ItemModel(int id)
+        {
+            ID = id;
+        }
+
+        /// <summary>
+        /// The ID of this Item
+        /// </summary>
+        public int ID { get; }
+
+        public override string ToString()
+        {
+            return $"Item {ID}";
+        }
     }
 }