FIXES

Toolkit.Foundation/ObservableCollection.cs

@@ -612,11 +612,11 @@ public partial class ObservableCollection<TValue, TViewModel> :
         Value = value;
     }
 
-    protected virtual void OnChanged(TValue? value)
+    protected virtual void Changed(TValue? value)
     {
     }
 
-    partial void OnValueChanged(TValue? value) => OnChanged(value);
+    partial void OnValueChanged(TValue? value) => Changed(value);
 }
 
 public partial class ObservableCollection<TKey, TValue, TViewModel> :

Toolkit.Foundation/ObservableConfiguration.cs

@@ -1,28 +1,46 @@
 using CommunityToolkit.Mvvm.Messaging;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace Toolkit.Foundation;
 
-public partial class ObservableConfiguration<TConfiguration, TValue>(IServiceProvider provider,
-    IServiceFactory factory,
-    IMessenger messenger,
-    IDisposer disposer,
-    TConfiguration configuration,
-    IWritableConfiguration<TConfiguration> writer,
-    Func<TConfiguration, TValue?> read,
-    Action<TValue?, TConfiguration> write) :
-    Observable<TValue>(provider, factory, messenger, disposer),
-    IHandler<ChangedEventArgs<TConfiguration>>
+public partial class ObservableConfiguration<TConfiguration, TValue> :
+    Observable<TValue>,
+    IRecipient<ChangedEventArgs<TConfiguration>>
     where TConfiguration : class
 {
-    public void Handle(ChangedEventArgs<TConfiguration> args)
+    private readonly TConfiguration configuration;
+    private readonly IWritableConfiguration<TConfiguration> writer;
+    private readonly Func<TConfiguration, TValue?> read;
+    private readonly Action<TValue?, TConfiguration> write;
+    private readonly IDispatcher dispatcher;
+
+    public ObservableConfiguration(IServiceProvider provider,
+        IServiceFactory factory,
+        IMessenger messenger,
+        IDisposer disposer,
+        TConfiguration configuration,
+        IWritableConfiguration<TConfiguration> writer,
+        Func<TConfiguration, TValue?> read,
+        Action<TValue?, TConfiguration> write,
+        TValue? value = default) : base(provider, factory, messenger, disposer)
+    {
+        this.configuration = configuration;
+        this.writer = writer;
+        this.read = read;
+        this.write = write;
+
+        dispatcher = provider.GetRequiredService<IDispatcher>();
+    }
+
+    public void Receive(ChangedEventArgs<TConfiguration> args)
     {
         if (args.Sender is TConfiguration configuration)
         {
-            Value = read(configuration);
+            dispatcher.Invoke(() => Value = read(configuration));
         }
     }
 
-    protected override void Activated() => Value = read(configuration);
+    protected override void Activated() => dispatcher.Invoke(() => Value = read(configuration));
 
     protected override void Changed(TValue? value)
     {
@@ -30,5 +48,7 @@ public partial class ObservableConfiguration<TConfiguration, TValue>(IServicePro
         {
             writer.Write(args => write(value, args));
         }
+
+        base.Changed(value);
     }
 }

Toolkit.Foundation/ObservableConfigurationCollection.cs

@@ -1,10 +1,11 @@
 using CommunityToolkit.Mvvm.Messaging;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace Toolkit.Foundation;
 
 public partial class ObservableConfigurationCollection<TConfiguration, TValue, TViewModel> :
     ObservableCollection<TValue, TViewModel>,
-    IHandler<ChangedEventArgs<TConfiguration>>
+    IRecipient<ChangedEventArgs<TConfiguration>>
     where TConfiguration : class
     where TViewModel : notnull,
     IDisposable
@@ -13,6 +14,7 @@ public partial class ObservableConfigurationCollection<TConfiguration, TValue, T
     private readonly Func<TConfiguration, TValue?> read;
     private readonly Action<TValue?, TConfiguration> write;
     private readonly IWritableConfiguration<TConfiguration> writer;
+    private readonly IDispatcher dispatcher;
 
     public ObservableConfigurationCollection(IServiceProvider provider,
         IServiceFactory factory,
@@ -29,6 +31,7 @@ public partial class ObservableConfigurationCollection<TConfiguration, TValue, T
         this.read = read;
         this.write = write;
 
+        dispatcher = provider.GetRequiredService<IDispatcher>();
         Value = value;
     }
 
@@ -48,29 +51,27 @@ public partial class ObservableConfigurationCollection<TConfiguration, TValue, T
         this.read = read;
         this.write = write;
 
+        dispatcher = provider.GetRequiredService<IDispatcher>();
         Value = value;
     }
 
-    public void Handle(ChangedEventArgs<TConfiguration> args)
+    public void Receive(ChangedEventArgs<TConfiguration> args)
     {
         if (args.Sender is TConfiguration configuration)
         {
-            Value = read(configuration);
+            dispatcher.Invoke(() => Value = read(configuration));
         }
     }
 
-    protected override void Activated()
-    {
-        Value = read(configuration);
-    }
+    protected override void Activated() => dispatcher.Invoke(() => Value = read(configuration));
 
-    protected override void OnChanged(TValue? value)
+    protected override void Changed(TValue? value)
     {
         if (IsActive)
         {
             writer.Write(args => write(value, args));
         }
 
-        base.OnChanged(value);
+        base.Changed(value);
     }
 }

Toolkit.UI.WinUI/BoolToVisibilityConverter.cs

@@ -0,0 +1,21 @@
+using Microsoft.UI.Xaml;
+using System;
+
+namespace Toolkit.UI.WinUI;
+
+public class BoolToVisibilityConverter :
+    ValueConverter<bool, Visibility>
+{
+    public Visibility TrueValue { get; set; } = Visibility.Visible;
+
+    public Visibility FalseValue { get; set; } = Visibility.Collapsed;
+
+    protected override Visibility ConvertTo(bool value,
+        Type? targetType,
+        object? parameter,
+        string? language)
+    {
+        _ = bool.TryParse(value.ToString(), out bool parsed);
+        return parsed ? TrueValue : FalseValue;
+    }
+}

Toolkit.UI.WinUI/ValidationToBoolConverter.cs

@@ -3,7 +3,7 @@ using Toolkit.Foundation;
 
 namespace Toolkit.UI.WinUI;
 
-public class ValidationBooleanConverter :
+public class ValidationToBoolConverter :
     ValueConverter<IReadOnlyIndexDictionary<string, string>, bool>
 {
     public string? Property { get; set; }

Toolkit.UI.WinUI/ValidationToMessageConverter.cs

@@ -3,7 +3,7 @@ using Toolkit.Foundation;
 
 namespace Toolkit.UI.WinUI;
 
-public class ValidationMessageConverter :
+public class ValidationToMessageConverter :
     ValueConverter<IReadOnlyIndexDictionary<string, string>, string?>
 {
     public string? Property { get; set; }