too many to add

Hyperbar.Widget.Windows/IServiceCollectionExtensions.cs

@@ -1,6 +1,8 @@
 using Hyperbar.Interop.Windows;
 using Hyperbar.UI.Windows;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.UI.Xaml.Markup;
+using System.Collections.Generic;
 
 namespace Hyperbar.Widget.Windows;
 
@@ -16,6 +18,7 @@ public static class IServiceCollectionExtensions
         services.AddTransient<IProxyServiceCollection<IWidgetBuilder>>(provider =>
             new ProxyServiceCollection<IWidgetBuilder>(services =>
             {
+                services.AddSingleton(provider.GetRequiredService<IList<IXamlMetadataProvider>>());
                 services.AddSingleton(provider.GetRequiredService<IDispatcher>());
                 services.AddTransient<IFactory<IWidgetHost, WidgetContainerViewModel?>,
                     WidgetContainerFactory>();
@@ -29,7 +32,8 @@ public static class IServiceCollectionExtensions
                 services.AddHandler<WidgetViewModelEnumerator>();
 
                 services.AddTransient<IWidgetView, WidgetView>();
-                services.AddTransient<IInitializer, WidgetResourceInitialization>();
+                services.AddTransient<IInitializer, WidgetResourceInitializer>();
+                services.AddTransient<IInitializer, WidgetXamlMetadataInitializer>();
 
                 services.AddContentTemplate<WidgetContainerViewModel, WidgetContainerView>();
                 services.AddContentTemplate<WidgetButtonViewModel, WidgetButtonView>();

Hyperbar.Widget.Windows/WidgetBarView.xaml

@@ -3,8 +3,8 @@
     x:Class="Hyperbar.Widget.Windows.WidgetBarView"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    xmlns:ui="using:Hyperbar.UI.Windows">
-    <ItemsControl ItemTemplateSelector="{Binding Converter={ui:DataTemplateConverter}}" ItemsSource="{Binding}">
+    xmlns:windows="using:Hyperbar.UI.Windows">
+    <ItemsControl ItemTemplateSelector="{Binding Converter={windows:DataTemplateConverter}}" ItemsSource="{Binding}">
         <ItemsControl.ItemsPanel>
             <ItemsPanelTemplate>
                 <StackPanel Orientation="Horizontal" />

Hyperbar.Widget.Windows/WidgetResourceInitializer.cs

@@ -3,7 +3,7 @@ using Windows.Storage;
 
 namespace Hyperbar.Widget.Windows;
 
-internal class WidgetResourceInitialization(IWidgetAssembly widgetAssembly) :
+internal class WidgetResourceInitializer(IWidgetAssembly widgetAssembly) :
     IInitializer
 {
     public async Task InitializeAsync()

Hyperbar.Widget.Windows/WidgetView.xaml

@@ -5,9 +5,9 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:interactions="using:Microsoft.Xaml.Interactions.Core"
     xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
-    xmlns:ui="using:Hyperbar.UI.Windows">
+    xmlns:windows="using:Hyperbar.UI.Windows">
     <Grid>
-        <ItemsControl ItemTemplateSelector="{Binding Converter={ui:DataTemplateConverter}}" ItemsSource="{Binding Mode=TwoWay}">
+        <ItemsControl ItemTemplateSelector="{Binding Converter={windows:DataTemplateConverter}}" ItemsSource="{Binding Mode=TwoWay}">
             <ItemsControl.ItemsPanel>
                 <ItemsPanelTemplate>
                     <StackPanel Orientation="Horizontal" Spacing="8" />

Hyperbar.Widget.Windows/WidgetXamlMetadataInitializer.cs

@@ -0,0 +1,20 @@
+using Microsoft.UI.Xaml.Markup;
+
+namespace Hyperbar.Widget.Windows;
+
+public class WidgetXamlMetadataInitializer(IWidgetAssembly widgetAssembly,
+    IList<IXamlMetadataProvider> xamlMetadataProviders) :
+    IInitializer
+{
+    public Task InitializeAsync()
+    {
+        foreach (IXamlMetadataProvider xamlMetadataProvider in widgetAssembly.Assembly.ExportedTypes
+            .Where(type => type.IsAssignableTo(typeof(IXamlMetadataProvider)))
+            .Select(metadataType => (IXamlMetadataProvider)Activator.CreateInstance(metadataType)!))
+        {
+            xamlMetadataProviders.Add(xamlMetadataProvider);
+        }
+
+        return Task.CompletedTask;
+    }
+}